图锟轿伙拷锟斤拷 | Programming Windows锟斤拷式锟斤拷锟斤拷锟斤拷锟街革拷锟� http:///aosp.me/res/wd/

5. 图锟轿伙拷锟斤拷

图锟斤拷装锟矫斤拷锟芥（GDI锟斤拷Graphics Device Interface锟斤拷锟斤拷Windows锟斤拷锟斤拷系统锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷印锟斤拷锟斤拷锟斤拷锟斤拷示图锟轿★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷GDI锟斤拷Windows锟角筹拷锟斤拷要锟侥诧拷锟街★拷锟斤拷只锟斤拷为Windows锟斤拷写锟斤拷应锟斤拷系统锟斤拷锟斤拷示锟接撅拷锟斤拷讯时使锟斤拷GDI锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷也使锟斤拷GDI锟斤拷锟斤拷示使锟斤拷锟竭斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷绻︼拷鼙锟斤拷锟斤拷锟斤拷锟斤拷小锟酵际撅拷突锟斤拷锟斤拷伪辍�

锟斤拷锟揭碉拷锟角ｏ拷锟斤拷锟揭拷锟紾DI锟斤拷锟斤拷全锟斤拷慕锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷椋拷锟饺伙拷锟斤拷锟斤拷獗撅拷椤ｏ拷诒锟斤拷锟斤拷校锟斤拷锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷峁╋拷锟斤拷吆锟斤拷锟斤拷锟斤拷锟斤拷锟侥伙拷锟斤拷知识锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟芥几锟铰碉拷GDI锟窖撅拷锟姐够锟剿★拷锟斤拷锟斤拷锟芥几锟斤拷锟叫会讲锟斤拷GDI支援锟侥碉拷锟斤拷图锟斤拷metafile锟皆硷拷锟斤拷式锟斤拷锟斤拷锟街★拷

GDI锟侥结构
锟斤拷

锟接筹拷式写锟斤拷锟竭的观碉拷锟斤拷锟斤拷锟斤拷GDI锟缴硷拷锟劫革拷锟斤拷式锟斤拷锟叫猴拷一些锟斤拷氐锟斤拷锟斤拷锟斤拷锟教拷锟斤拷藜锟斤拷徒峁癸拷锟缴★拷锟斤拷锟斤拷锟节匡拷始锟斤拷锟斤拷锟斤拷些锟斤拷式锟斤拷细锟斤拷之前锟斤拷锟斤拷锟斤拷锟斤拷锟饺从巨癸拷锟斤拷锟剿斤拷一锟斤拷GDI锟斤拷锟斤拷锟斤拷峁癸拷锟�

GDI原锟斤拷
锟斤拷

Windows 98锟斤拷Microsoft Windows NT锟叫碉拷图锟斤拷锟斤拷要锟斤拷GDI32.DLL锟斤拷态锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟侥猴拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Windows 98锟叫ｏ拷锟斤拷锟紾DI32.DLL实锟斤拷锟斤拷锟斤拷锟斤拷16位元GDI.EXE锟斤拷态锟斤拷锟斤拷锟绞斤拷锟斤拷锟街达拷锟斤拷锟斤拷嗪斤拷锟斤拷锟絎indows NT锟叫ｏ拷GDI.EXE只锟斤拷锟�16位元锟侥筹拷式锟斤拷

锟斤拷些锟斤拷态锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷锟轿猴拷印锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟叫的筹拷式锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷式锟斤拷取锟斤拷讯锟斤拷示锟斤拷锟斤拷硬锟藉，印锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷GDI锟斤拷锟斤拷转锟斤拷为锟斤拷锟斤拷印锟斤拷锟斤拷锟杰癸拷锟斤拷锟斤拷拇锟斤拷锟斤拷锟斤拷锟斤拷锟筋。锟斤拷然锟斤拷锟斤拷同锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷印锟斤拷锟斤拷要锟斤拷同锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷

锟斤拷为PC锟斤拷锟捷伙拷锟斤拷锟较匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街诧拷同锟斤拷锟斤拷讯锟借备锟斤拷锟斤拷锟皆ｏ拷GDI锟斤拷锟斤拷要目锟斤拷之一锟斤拷支援锟斤拷装锟斤拷锟睫关碉拷图锟轿★拷Windows锟斤拷式应锟斤拷锟杰癸拷锟斤拷锟斤拷锟斤拷锟窖碉拷锟斤拷Windows支援锟斤拷锟斤拷锟斤拷一锟斤拷图锟斤拷锟斤拷锟斤拷璞革拷锟街达拷校锟紾DI通锟斤拷锟斤拷锟斤拷锟侥筹拷式锟酵诧拷同锟斤拷锟斤拷璞革拷锟斤拷锟斤拷愿锟斤拷肟拷锟斤拷姆锟斤拷锟斤拷锟斤拷锏斤拷锟揭荒匡拷摹锟�

图锟斤拷锟斤拷锟斤拷璞革拷锟轿拷锟斤拷锟斤拷啵何辉筹拷锟斤拷璞革拷锟斤拷锟斤拷锟斤拷璞革拷锟斤拷锟斤拷锟斤拷PC锟斤拷锟斤拷锟斤拷璞革拷锟轿辉筹拷锟斤拷璞革拷锟斤拷锟斤拷锟轿讹拷锟斤拷锟斤拷锟斤拷锟酵硷拷愎癸拷傻锟斤拷锟斤拷锟斤拷锟斤拷锟绞就硷拷锟斤拷锟斤拷锟斤拷璞革拷锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷璞甘癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵硷拷锟酵拷锟斤拷锟斤拷锟届痘锟酵硷拷锟斤拷锟�

锟斤拷锟洁传统锟侥碉拷锟斤拷图锟轿筹拷式锟斤拷品锟绞斤拷锟斤拷锟斤拷锟饺拷锟斤拷锟斤拷锟轿拷锟斤拷模锟斤拷锟斤拷锟轿讹拷锟绞癸拷锟斤拷锟斤拷锟酵硷拷锟较低筹拷某锟绞斤拷锟接诧拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟轿的革拷锟诫。锟斤拷锟斤拷璞革拷锟酵硷拷乇锟绞就硷拷危锟斤拷锟斤拷浅锟绞斤拷锟斤拷式锟斤拷锟斤拷之锟戒并锟斤拷锟斤拷锟斤拷图锟截斤拷锟叫癸拷通锟侥★拷锟斤拷锟斤拷然锟斤拷锟斤拷使锟斤拷Windows GDI锟斤拷为一锟斤拷锟竭阶碉拷锟斤拷锟斤拷锟斤拷锟斤拷系统锟斤拷同时也锟斤拷锟皆斤拷锟斤拷锟斤拷於比较低阶碉拷图锟截诧拷锟斤拷锟斤拷

锟斤拷锟解方锟斤拷锟斤拷锟斤拷锟斤拷Windows GDI锟酵达拷统锟斤拷图锟轿斤拷锟斤拷锟斤拷锟斤拷之锟斤拷墓锟较碉拷锟斤拷锟斤拷锟酵珻锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟街拷锟侥癸拷系一锟斤拷锟斤拷C锟斤拷锟斤拷锟节诧拷同锟斤拷业系统锟酵伙拷锟斤拷之锟斤拷母叨瓤锟叫拷远锟斤拷锟斤拷锟斤拷锟饺伙拷锟紺也锟斤拷锟斤拷锟斤拷锟斤拷式写锟斤拷锟竭斤拷锟叫低斤拷系统锟斤拷锟叫讹拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭斤拷锟斤拷锟斤拷锟斤拷通锟斤拷锟角诧拷锟斤拷锟杰的★拷锟斤拷锟斤拷C锟斤拷时锟斤拷锟斤拷为锟斤拷一锟街★拷锟竭硷拷锟斤拷锟斤拷锟斤拷浴锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿狦DI锟斤拷图锟斤拷锟借备硬锟斤拷之锟斤拷锟揭伙拷指呓捉锟斤拷妗�

锟斤拷锟窖撅拷锟斤拷锟斤拷锟斤拷Windows锟节讹拷使锟斤拷图锟斤拷锟斤拷锟斤拷系统锟斤拷锟斤拷锟斤拷锟斤拷锟酵筹拷锟酵硷拷锟斤拷锟斤拷锟绞癸拷谩锟斤拷锟斤拷狻癸拷锟斤拷锟较碉拷锟斤拷锟剿斤拷痛锟街憋拷锟侥凤拷围锟斤拷0锟斤拷32,767之锟戒。锟斤拷然锟斤拷些图锟斤拷锟斤拷锟皆诧拷锟斤拷锟斤拷使锟斤拷图锟斤拷锟斤拷锟疥，锟斤拷锟斤拷Windows GDI锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系统之一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟绞讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟较碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟较碉拷员锟斤拷贸锟绞斤拷锟斤拷锟斤拷硬锟斤拷之锟解，锟斤拷锟斤拷也锟斤拷锟斤拷使锟斤拷锟借备锟斤拷锟斤拷系锟斤拷锟斤拷全迎锟斤拷硬锟斤拷锟借备锟结供锟侥伙拷锟斤拷锟斤拷

某些锟斤拷式写锟斤拷锟斤拷锟斤拷为一锟斤拷锟斤拷始使锟矫诧拷锟斤拷图锟截的筹拷式锟斤拷品锟绞斤拷锟斤拷头锟斤拷锟斤拷锟阶帮拷锟斤拷薰锟斤拷浴锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷驴锟斤拷锟斤拷锟斤拷獠伙拷锟饺拷锟斤拷锟饺凤拷模锟斤拷锟斤拷械木锟斤拷锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷薰氐姆锟绞斤拷锟绞癸拷锟酵硷拷亍锟斤拷锟揭拷锟酵硷拷谓锟斤拷锟斤拷锟斤拷锟轿拷锟绞斤拷峁┮恍╋拷锟斤拷锟斤拷锟饺凤拷锟斤拷璞革拷锟接诧拷锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟斤拷实锟斤拷牡锟斤拷凇锟斤拷锟斤拷纾拷锟絊YSMETS锟斤拷式锟叫ｏ拷锟斤拷锟角革拷锟捷憋拷准系统锟斤拷锟斤拷锟斤拷元锟斤拷图锟截达拷小锟斤拷确锟斤拷萤幕锟较碉拷锟斤拷锟街硷拷啵拷锟斤拷址锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟皆斤拷锟斤拷锟饺★拷锟斤拷锟街达拷小锟酵凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟接︼拷牡锟斤拷凇锟斤拷锟斤拷锟斤拷诒锟斤拷驴锟斤拷锟揭恍╋拷锟斤拷确锟斤拷锟斤拷示锟竭达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟节ｏ拷锟斤拷锟斤拷使锟斤拷锟斤拷锟节碉拷色锟斤拷示锟斤拷锟斤拷执锟斤拷Windows锟斤拷锟斤拷使锟角硷拷锟斤拷前锟斤拷锟绞记憋拷锟斤拷锟斤拷也锟斤拷只锟叫灰斤拷锟斤拷示锟斤拷为锟剿ｏ拷GDI锟斤拷锟斤拷票锟街わ拷锟斤拷锟斤拷锟斤拷锟斤拷诒锟叫匆伙拷锟斤拷锟绞绞憋拷锟斤拷锟教拷锟斤拷锟缴拷锟斤拷锟斤拷猓诧拷锟斤拷锟剿碉拷锟絎indows锟斤拷锟皆斤拷色锟斤拷转锟斤拷为锟揭斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟节斤拷锟届，Windows 98使锟矫碉拷锟斤拷讯锟斤拷示锟窖撅拷锟斤拷锟斤拷锟剿诧拷同锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷16色锟斤拷256色锟斤拷锟斤拷high-Color锟斤拷锟皆硷拷锟斤拷true-color锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷色锟斤拷墨印锟斤拷锟斤拷锟侥成憋拷锟窖撅拷锟杰碉拷锟剿ｏ拷锟斤拷锟角达拷锟斤拷锟绞癸拷锟斤拷锟斤拷锟饺伙拷锟斤拷使锟矫黑帮拷印锟斤拷锟斤拷锟斤拷盲目锟斤拷使锟斤拷锟斤拷些锟借备锟角匡拷锟皆的ｏ拷锟斤拷锟斤拷锟斤拷锟侥筹拷式也应锟斤拷锟杰撅拷锟斤拷锟斤拷某锟斤拷锟斤拷示锟借备锟斤拷锟叫讹拷锟斤拷色锟绞匡拷锟斤拷使锟矫ｏ拷锟接讹拷锟斤拷锟斤拷锟斤拷锟接诧拷骞︼拷堋锟�

锟斤拷然锟斤拷锟斤拷锟斤拷同锟斤拷锟斤拷写C锟斤拷式时锟斤拷为锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷执锟叫讹拷锟斤拷锟斤拷一些微锟斤拷锟斤拷锟街诧拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟揭诧拷锟斤拷懿锟叫★拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Windows锟斤拷式锟斤拷锟斤拷锟斤拷遣锟斤拷锟接诧拷锟斤拷锟饺拷锟斤拷锟侥达拷锟桔★拷锟斤拷锟斤拷应锟斤拷知锟斤拷Windows GDI锟侥撅拷锟睫★拷锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟较碉拷锟斤拷锟狡讹拷图锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI通锟斤拷锟斤拷一锟斤拷锟斤拷态锟斤拷锟斤拷示系统锟斤拷只锟斤拷锟斤拷锟睫的讹拷锟斤拷支援锟斤拷锟斤拷锟斤拷锟揭拷锟较凤拷锟叫达拷锟斤拷拥亩锟斤拷锟斤拷锟斤拷锟接︼拷锟斤拷芯锟揭伙拷锟組icrosoft DirectX锟斤拷锟斤拷锟结供锟斤拷锟斤拷锟斤拷要锟斤拷支援锟斤拷

GDI锟斤拷式锟斤拷锟斤拷
锟斤拷

锟斤拷锟紾DI锟侥硷拷锟劫革拷锟斤拷式锟斤拷锟叫匡拷锟皆凤拷为锟斤拷锟斤拷锟洁：

取锟矫ｏ拷锟斤拷锟竭斤拷锟斤拷锟斤拷锟斤拷锟酵放ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷莸暮锟绞� 锟斤拷锟斤拷锟斤拷前锟斤拷锟斤拷陆锟斤拷锟斤拷丫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诨锟酵际憋拷锟揭帮拷锟斤拷锟斤拷荽锟斤拷拧锟紾etDC锟斤拷RealseDC锟斤拷式锟斤拷锟斤拷锟节凤拷WM_PAINT锟斤拷讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟斤拷锟斤拷一锟姐，锟斤拷BeginPaint锟斤拷EndPaint锟斤拷式锟斤拷锟斤拷然锟节硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷USER模锟斤拷锟斤拷锟斤拷锟紾DI模锟斤拷锟揭伙拷锟斤拷郑锟斤拷诮锟斤拷谢锟酵硷拷锟絎M_PAINT讯息锟斤拷锟斤拷锟节硷拷使锟矫★拷锟斤拷锟斤拷锟斤拷锟较伙拷锟斤拷锟斤拷锟斤拷泄锟阶帮拷锟斤拷锟斤拷莸锟斤拷锟斤拷锟揭恍╋拷锟绞斤拷锟�
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使锟斤拷GDI锟斤拷锟斤拷暮锟绞� GDI锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷摇锟斤拷锟斤拷染锟揭伙拷锟斤拷锟斤拷樱锟斤拷诙锟绞笔癸拷锟紾DI锟斤拷锟狡碉拷锟斤拷锟斤拷直锟竭讹拷锟斤拷实锟竭诧拷锟斤拷锟斤拷一锟斤拷锟斤拷准锟侥匡拷锟饺★拷锟斤拷锟斤拷锟斤拷希锟斤拷锟斤拷锟狡革拷细锟斤拷直锟竭ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷一系锟叫的碉拷锟教伙拷锟斤拷锟斤拷傻锟街憋拷摺锟斤拷锟斤拷锟斤拷叩目锟斤拷群锟斤拷锟斤拷锟斤拷叩幕锟斤拷锟斤拷锟绞斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷莸锟斤拷锟斤拷裕锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷呒锟斤拷锟斤拷省锟斤拷锟斤拷锟斤拷纭ｏ拷锟斤拷锟斤拷锟酵拷锟斤拷锟紺reatePen锟斤拷 CreatePenIndirect锟斤拷ExtCreatePen锟斤拷式锟斤拷指锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟竭硷拷锟斤拷锟绞ｏ拷锟斤拷些锟斤拷式锟斤拷锟斤拷一锟斤拷锟竭硷拷锟斤拷锟绞的达拷锟脚ｏ拷锟斤拷然锟斤拷些锟斤拷式锟斤拷锟斤拷为锟斤拷GDI锟斤拷一锟斤拷锟街ｏ拷锟斤拷锟角和达拷锟斤拷锟紾DI锟斤拷式锟斤拷锟叫诧拷一锟斤拷锟斤拷锟斤拷锟角诧拷要锟斤拷装锟斤拷锟斤拷锟捷的达拷锟脚ｏ拷锟斤拷要使锟斤拷锟斤拷锟斤拷锟斤拷剩锟斤拷锟揭拷锟斤拷锟斤拷蚀锟斤拷锟窖★拷锟阶帮拷锟斤拷锟斤拷荨锟斤拷锟斤拷锟斤拷锟轿拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟侥壳把★拷械幕锟斤拷示锟斤拷锟阶帮拷锟斤拷锟斤拷莸锟揭伙拷锟斤拷锟斤拷浴锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷魏锟斤拷叨锟绞癸拷锟斤拷锟斤拷锟斤拷锟绞ｏ拷然锟结，锟斤拷锟斤拷锟斤拷取锟斤拷装锟斤拷锟斤拷锟斤拷锟叫的伙拷锟斤拷选锟今，诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角憋拷要锟侥ｏ拷锟斤拷为锟斤拷锟绞讹拷锟斤拷占锟斤拷锟剿凤拷锟斤拷募锟斤拷锟斤拷锟秸间。锟斤拷锟剿伙拷锟斤拷锟斤拷锟解，GDI锟斤拷锟斤拷锟斤拷锟届督锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥伙拷刷锟斤拷锟斤拷锟藉、锟斤拷锟斤拷图锟皆硷拷GDI锟斤拷锟斤拷锟斤拷一些锟斤拷锟芥。
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锟斤拷锟斤拷 锟斤拷锟街碉拷锟斤拷学味锟斤拷锟斤拷锟斤拷锟斤拷锟酵硷拷蔚锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟脚拷锟斤拷锟斤拷趾图锟斤拷锟斤拷锟侥达拷统印刷锟斤拷锟叫关ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷印刷锟斤拷锟剿匡拷锟斤拷为一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷耍锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷械牡锟斤拷锟酵硷拷锟较低筹拷锟斤拷罡达拷拥牟锟斤拷郑锟斤拷锟斤拷遥锟斤拷锟斤拷识锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷幕锟斤拷锟揭诧拷锟斤拷锟斤拷锟揭拷牟锟斤拷帧锟斤拷锟届抖锟斤拷锟紾DI锟斤拷锟斤拷锟斤拷锟斤拷锟饺★拷锟斤拷锟斤拷锟斤拷锟窖讹拷锟斤拷锟斤拷辖峁癸拷锟絎indows锟斤拷锟斤拷锟接达拷牟锟斤拷锟街伙拷锟斤拷锟絎indows 3.1锟斤拷始锟斤拷GDI锟斤拷始支援TrueType锟斤拷锟藉，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭伙拷锟斤拷锟较斤拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭匡拷锟斤拷锟斤拷锟斤拷GDI锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆和达拷锟斤拷锟叫★拷目锟斤拷牵锟絎indows 98锟斤拷锟斤拷支援锟斤拷式锟侥碉拷锟斤拷锟斤拷锟藉。锟揭伙拷锟节碉拷十锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟藉。
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锟节匡拷始锟斤拷图之前锟斤拷锟斤拷锟斤拷锟角比碉拷锟斤拷锟铰革拷锟斤拷确锟斤拷锟斤拷锟斤拷一锟斤拷装锟斤拷锟斤拷锟捷★拷

锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷图锟斤拷锟斤拷锟斤拷璞革拷锟斤拷锟斤拷锟接┠伙拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷匣锟酵际憋拷锟斤拷锟斤拷锟斤拷缺锟斤拷锟斤拷锟揭伙拷锟阶帮拷锟斤拷锟斤拷荩锟斤拷锟斤拷锟紻C锟斤拷锟侥达拷锟脚★拷锟斤拷锟斤拷锟脚达拷锟截革拷锟斤拷式时锟斤拷Windows锟酵革拷锟斤拷锟斤拷使锟斤拷锟借备锟斤拷锟斤拷锟斤拷权锟斤拷然锟斤拷锟斤拷锟斤拷GDI锟斤拷式锟叫斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟絎indows锟斤拷识锟斤拷锟斤拷锟斤拷锟斤拷锟较斤拷锟叫伙拷图锟斤拷锟借备锟斤拷

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取锟斤拷装锟斤拷锟斤拷锟捷达拷锟斤拷
锟斤拷

Windows锟结供锟剿硷拷锟斤拷取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚的凤拷锟斤拷锟斤拷锟斤拷锟斤拷诖锟斤拷锟揭伙拷锟窖断⑹比★拷锟斤拷锟阶帮拷锟斤拷锟斤拷荽锟斤拷牛锟接︼拷锟斤拷锟斤拷顺锟斤拷哟锟斤拷锟绞街帮拷头锟斤拷锟斤拷锟斤拷锟斤拷锟缴撅拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷头锟斤拷舜锟斤拷牛锟斤拷锟斤拷筒锟斤拷锟斤拷锟叫э拷恕锟斤拷锟斤拷印锟斤拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷锟斤拷锟矫伙拷锟斤拷锟矫达拷细锟斤拷诘锟绞拷锟斤拷禄锟斤拷锟斤拷锟斤拷锟接★拷锟�

锟筋常锟矫碉拷取锟矫诧拷锟酵凤拷装锟斤拷锟斤拷锟捷达拷锟脚的凤拷锟斤拷锟角ｏ拷锟节达拷锟斤拷WM_PAINT讯息时锟斤拷使锟斤拷BeginPaint锟斤拷EndPaint锟斤拷锟叫ｏ拷

hdc = BeginPaint (hwnd, &ps) ; 
锟斤拷锟斤拷锟叫筹拷式
EndPaint (hwnd, &ps) ;

锟斤拷锟斤拷ps锟斤拷锟斤拷态为PAINTSTRUCT锟侥结构锟斤拷锟矫结构锟斤拷hdc锟斤拷位锟斤拷BeginPaint锟斤拷锟截碉拷装锟斤拷锟斤拷锟捷达拷锟脚★拷 PAINTSTRUCT锟结构锟街帮拷锟斤拷一锟斤拷锟斤拷为rcPaint锟斤拷RECT锟斤拷锟斤拷锟轿ｏ拷锟结构锟斤拷rcPaint锟斤拷锟斤拷一锟斤拷锟斤拷围锟接达拷锟斤拷示锟斤拷锟斤拷锟斤拷效锟斤拷围锟侥撅拷锟轿★拷使锟矫达拷BeginPaint锟斤拷玫锟阶帮拷锟斤拷锟斤拷荽锟斤拷牛锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节伙拷图锟斤拷BeginPaint锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷

Windows锟斤拷式锟斤拷锟斤拷锟斤拷锟节达拷锟斤拷锟斤拷WM_PAINT讯息时取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷

hdc = GetDC (hwnd) ; 
锟斤拷锟斤拷锟叫筹拷式
ReleaseDC (hwnd, hdc) ;

锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷为hwnd锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷BeginPaint锟斤拷EndPaint锟斤拷锟斤拷锟街拷锟侥伙拷锟斤拷锟斤拷锟斤拷锟角ｏ拷锟斤拷锟矫达拷GetDC锟斤拷锟截的达拷锟脚匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟较伙拷图锟斤拷锟斤拷然锟斤拷 GetDC锟斤拷ReleaseDC锟斤拷使锟斤拷示锟斤拷锟斤拷锟斤拷锟轿何匡拷锟杰碉拷锟斤拷效锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷

Windows锟斤拷式锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟津）碉拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷

hdc = GetWindowDC (hwnd) ; 
锟斤拷锟斤拷锟叫筹拷式
ReleaseDC (hwnd, hdc) ;

锟斤拷锟阶帮拷锟斤拷锟斤拷莩锟斤拷锟斤拷锟绞撅拷锟斤拷锟街拷猓拷锟斤拷锟斤拷锟斤拷哟锟斤拷谋锟斤拷锟斤拷小锟斤拷锟斤拷鼙锟斤拷锟斤拷锟斤拷锟斤拷泻涂锟杰ｏ拷frame锟斤拷锟斤拷GetWindowDC锟斤拷式锟斤拷锟斤拷使锟矫ｏ拷锟斤拷锟斤拷氤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟截达拷锟斤拷WM_NCPAINT讯息锟斤拷Windows使锟矫革拷讯息锟斤拷锟接达拷锟侥凤拷锟斤拷示锟斤拷锟斤拷锟较伙拷图锟斤拷

BeginPaint锟斤拷GetDC锟斤拷GetWindowDC锟斤拷玫锟阶帮拷锟斤拷锟斤拷荻锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷系锟侥筹拷锟斤拷囟锟斤拷哟锟斤拷锟截★拷取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚碉拷锟斤拷一锟斤拷锟斤拷通锟矫的猴拷式锟斤拷CreateDC锟斤拷

hdc = CreateDC (pszDriver, pszDevice, pszOutput, pData) ; 
锟斤拷锟斤拷锟叫筹拷式
DeleteDC (hdc) ;

锟斤拷锟界，锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷暮锟斤拷锟斤拷锟饺★拷锟斤拷锟斤拷锟接┠伙拷锟阶帮拷锟斤拷锟斤拷荽锟斤拷牛锟�

hdc = CreateDC (TEXT ("DISPLAY"), NULL, NULL, NULL) ;

锟斤拷锟接达拷之锟斤拷写锟诫画锟斤拷一锟斤拷锟角诧拷恰锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟揭恍╋拷锟酵帮拷锟斤拷锟接︼拷贸锟绞斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷锟斤拷芊锟斤拷悖拷锟斤拷锟斤拷锟酵拷锟斤拷诤锟斤拷锟紾etDC时使锟斤拷一锟斤拷NULL锟斤拷锟斤拷锟斤拷锟接讹拷取锟斤拷锟斤拷锟斤拷萤幕锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷锟窖撅拷锟结到锟剿ｏ拷锟斤拷锟节碉拷十锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟角斤拷使锟斤拷CreateDC锟斤拷式锟斤拷取锟斤拷一锟斤拷印锟斤拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷

锟斤拷时锟斤拷只锟斤拷锟斤拷要取锟矫癸拷锟侥匙帮拷锟斤拷锟斤拷莸锟揭恍╋拷锟窖讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷魏位婊拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷锟斤拷锟斤拷锟斤拷使锟斤拷CreateIC锟斤拷取锟斤拷一锟斤拷锟斤拷锟斤拷讯锟斤拷锟捷★拷锟侥达拷锟脚ｏ拷锟斤拷锟斤拷锟斤拷锟紺reateDC锟斤拷式锟斤拷同锟斤拷锟斤拷锟界：

hdc = CreateIC (TEXT ("DISPLAY"), NULL, NULL, NULL) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖讹拷锟斤拷荽锟斤拷锟斤拷锟斤拷璞革拷锟叫达拷锟斤拷锟斤拷锟�

使锟矫碉拷锟斤拷图时锟斤拷取锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷★拷锟斤拷时锟斤拷锟斤拷锟矫的ｏ拷

hdcMem = CreateCompatibleDC (hdc) ; 
锟斤拷锟斤拷锟叫筹拷式
DeleteDC (hdcMem) ;

锟斤拷锟斤拷锟皆斤拷锟斤拷锟斤拷图选锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷ｏ拷然锟斤拷使锟斤拷GDI锟斤拷式锟节碉拷锟斤拷图锟较绘画锟斤拷锟揭斤拷锟节碉拷十锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷

前锟斤拷锟窖撅拷锟结到锟斤拷锟斤拷metafile锟斤拷一些GDI锟斤拷锟叫的硷拷锟较ｏ拷锟皆讹拷锟斤拷位锟斤拷式锟斤拷锟诫。锟斤拷锟斤拷锟斤拷通锟斤拷取锟斤拷metafile装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷metafile锟斤拷

hdcMeta = CreateMetaFile (pszFilename) ; 
锟斤拷锟斤拷锟叫筹拷式
hmf = CloseMetaFile (hdcMeta) ;

锟斤拷metafile装锟斤拷锟斤拷锟斤拷锟斤拷效锟节间，锟轿猴拷锟斤拷hdcMeta锟斤拷锟斤拷锟斤拷GDI锟斤拷锟叫讹拷锟斤拷锟絤etafile锟斤拷一锟斤拷锟街讹拷锟斤拷锟斤拷锟斤拷示锟斤拷锟节猴拷锟斤拷CloseMetaFile之锟结，装锟斤拷锟斤拷锟捷达拷锟脚憋拷为锟斤拷效锟斤拷锟斤拷式锟斤拷锟斤拷一锟斤拷指锟斤拷metafile锟斤拷hmf锟斤拷锟侥达拷锟脚★拷锟揭伙拷锟节碉拷十锟斤拷锟斤拷锟斤拷锟斤拷metafile锟斤拷

取锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷讯
锟斤拷

一锟斤拷装锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷指一锟斤拷实锟斤拷锟斤拷示锟借备锟斤拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷印锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷要取锟斤拷锟叫关革拷锟借备锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟侥达拷小锟斤拷锟斤拷位为图锟截伙拷锟斤拷实锟绞筹拷锟饺碉拷位锟斤拷锟斤拷色锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷GetDeviceCaps锟斤拷锟斤拷取锟斤拷锟借备锟斤拷锟杰★拷锟斤拷锟斤拷式锟斤拷取锟斤拷锟斤拷些锟斤拷讯锟斤拷

iValue = GetDeviceCaps (hdc, iIndex) ;

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DEVCAPS1锟斤拷式
锟斤拷

锟斤拷式5-1锟斤拷示锟斤拷DEVCAPS1锟斤拷式锟斤拷示锟斤拷锟斤拷一锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷时锟斤拷锟斤拷锟皆达拷 GetDeviceCaps锟斤拷式锟叫伙拷玫牟锟斤拷锟斤拷锟窖讹拷锟斤拷贸锟绞斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟芥本DEVCAPS2锟斤拷锟节碉拷十锟斤拷锟铰革拷锟斤拷锟斤拷锟斤拷锟饺★拷锟接★拷锟斤拷锟斤拷锟窖讹拷锟斤拷锟�

 锟斤拷式5-1  DEVCAPS1
DEVCAPS1.C
/*------------------------------------------------------------------------
   DEVCAPS1.C -- Device Capabilities Display Program No. 1
	         (c) Charles Petzold, 1998
 ----------------------------------------------------------------------*/
#include <windows.h>
#define NUMLINES ((int) (sizeof devcaps / sizeof devcaps [0]))
struct
{
	int	iIndex ;
	TCHAR *	szLabel ;
	TCHAR *	szDesc ;
}
devcaps [] =
{
	HORZSIZE,	TEXT ("HORZSIZE"),TEXT ("Width in millimeters:"),
	VERTSIZE,	TEXT ("VERTSIZE"),TEXT ("Height in millimeters:"),
	HORZRES,	TEXT ("HORZRES"),	TEXT ("Width in pixels:"),
 	VERTRES, 	TEXT ("VERTRES"),	TEXT ("Height in raster lines:"),
	BITSPIXEL, 	TEXT ("BITSPIXEL"),TEXT ("Color bits per pixel:"),
	PLANES, 	TEXT ("PLANES"),   TEXT ("Number of color planes:"),
 	NUMBRUSHES,	TEXT ("NUMBRUSHES"),	TEXT ("Number of device brushes:"),
	NUMPENS,	TEXT ("NUMPENS"),  	TEXT ("Number of device pens:"),
 	NUMMARKERS,	TEXT ("NUMMARKERS"),	TEXT ("Number of device markers:"),
	NUMFONTS,	TEXT ("NUMFONTS"), 	TEXT ("Number of device fonts:"),
	NUMCOLORS,	TEXT ("NUMCOLORS"),	TEXT ("Number of device colors:"),
	PDEVICESIZE,	TEXT ("PDEVICESIZE"),	TEXT ("Size of device structure:"),
	ASPECTX, 	TEXT ("ASPECTX"), 	TEXT ("Relative width of pixel:"),
	ASPECTY, 	TEXT ("ASPECTY"),	TEXT ("Relative height of pixel:"),
	ASPECTXY,	TEXT ("ASPECTXY"),	TEXT ("Relative diagonal of pixel:"),
	LOGPIXELSX,	TEXT ("LOGPIXELSX"),	TEXT ("Horizontal dots per inch:"),
	LOGPIXELSY,	TEXT ("LOGPIXELSY"),	TEXT ("Vertical dots per inch:"),
	SIZEPALETTE,	TEXT ("SIZEPALETTE"),	TEXT ("Number of palette entries:"),
	NUMRESERVED,	TEXT ("NUMRESERVED"),	TEXT ("Reserved palette entries:"),
	COLORRES, 	TEXT ("COLORRES"), 	TEXT ("Actual color resolution:")
} ;

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
            PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("DevCaps1") ;
	HWND 		hwnd ;
	MSG 		msg ;
	WNDCLASS 	wndclass ;
     
	wndclass.style 		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra = 0 ;
	wndclass.hInstance 	= hInstance ;
	wndclass.hIcon 		= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;
     
	if (!RegisterClass (&wndclass))
	{
		MessageBox (	NULL, TEXT ("This program requires Windows NT!"),
             				szAppName, MB_ICONERROR) ;
		return 0 ;
     }
     
	hwnd = CreateWindow (	szAppName, TEXT ("Device Capabilities"),
                				WS_OVERLAPPEDWINDOW,
               				CW_USEDEFAULT, CW_USEDEFAULT,
        				CW_USEDEFAULT, CW_USEDEFAULT,
   				NULL, NULL, hInstance, NULL) ;
     
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
     
	while (GetMessage (&msg, NULL, 0, 0))
     {
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static int	cxChar, cxCaps, cyChar ;
	TCHAR 		szBuffer[10] ;
	HDC		hdc ;
	int		i ;
	PAINTSTRUCT	ps ;
	TEXTMETRIC	tm ;
     
	switch (message)
     {
	case WM_CREATE:
		hdc = GetDC (hwnd) ;
		GetTextMetrics (hdc, &tm) ;
		cxChar	= tm.tmAveCharWidth ;
		cxCaps	= (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2 ;
		cyChar	= tm.tmHeight + tm.tmExternalLeading ;
          
		ReleaseDC (hwnd, hdc) ;
		return 0 ;
          
	case WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;
		for (i = 0 ; i < NUMLINES ; i++)
		{
			TextOut (	hdc, 0, cyChar * i,
				devcaps[i].szLabel,
				lstrlen (devcaps[i].szLabel)) ;
               
			TextOut (	hdc, 14 * cxCaps, cyChar * i,
				devcaps[i].szDesc,
				lstrlen (devcaps[i].szDesc)) ;
               
			SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;
			TextOut (hdc, 14*cxCaps+35*cxChar, cyChar*i, szBuffer,
				wsprintf (szBuffer, TEXT ("%5d"),
				GetDeviceCaps (hdc, devcaps[i].iIndex))) ;
               
		SetTextAlign (hdc, TA_LEFT | TA_TOP) ;
		}
          
		EndPaint (hwnd, &ps) ;
		return 0 ;
          
	case WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

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锟斤拷

图5-1 256色锟斤拷640锟斤拷480VGA锟较碉拷DEVCAPS1锟斤拷示

装锟矫的达拷小
锟斤拷

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锟斤拷锟斤拷Windows使锟矫的达拷锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷锟接┠伙拷锟斤拷强锟斤拷雀叨锟�33%锟斤拷锟斤拷捅锟绞撅拷莺锟斤拷为1.33:1锟斤拷一锟斤拷写锟斤拷锟斤拷4:3锟斤拷锟斤拷史锟较ｏ拷锟矫憋拷锟斤拷锟斤拷追锟捷碉拷Thomas Edison锟斤拷锟斤拷锟斤拷影锟斤拷锟斤拷锟斤拷锟斤拷锟揭恢憋拷锟轿拷锟接帮拷谋锟阶硷拷莺锟饺ｏ拷直锟斤拷1953锟斤拷锟斤拷指锟斤拷锟斤拷锟教拷目锟斤拷锟侥煌队帮拷锟斤拷锟斤拷锟斤拷踊锟接┠伙拷锟斤拷莺锟斤拷也锟斤拷4:3锟斤拷

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640锟斤拷480图锟斤拷
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800锟斤拷600图锟斤拷
锟斤拷
1024锟斤拷768图锟斤拷
锟斤拷
1280锟斤拷1024图锟斤拷
锟斤拷
1600锟斤拷1200图锟斤拷
锟斤拷

锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷4:3锟斤拷锟斤拷锟斤拷锟斤拷1280锟斤拷1024图锟截达拷小锟斤拷锟解不锟斤拷锟斤拷些锟斤拷锟矫ｏ拷锟斤拷锟斤拷些锟斤拷锟剿凤拷锟叫★拷锟斤拷锟斤拷锟斤拷些图锟截尺寸都锟斤拷为锟斤拷4:3锟斤拷锟斤拷示锟斤拷锟较伙拷锟斤拷锟斤拷锟斤拷锟斤拷蔚锟酵硷拷亍锟斤拷锟�

Windows应锟矫筹拷式锟斤拷锟斤拷使锟斤拷SM_CXSCREEN锟斤拷SM_CYSCREEN锟斤拷锟斤拷锟斤拷GetSystemMetrics锟矫碉拷图锟截尺寸。锟斤拷DEVCAPS1锟斤拷式锟斤拷锟斤拷锟斤拷注锟解到锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷HORZRES锟斤拷水平锟斤拷锟斤拷锟饺ｏ拷锟斤拷VERTRES锟斤拷锟斤拷锟斤拷GetDeviceCaps锟叫得碉拷同锟斤拷锟斤拷值锟斤拷锟斤拷锟斤「锟斤拷锟斤拷锟饺★拷指锟斤拷锟斤拷图锟截达拷小锟斤拷锟斤拷锟斤拷每锟斤拷锟斤拷锟斤拷位锟斤拷图锟斤拷锟斤拷锟斤拷

锟斤拷些锟斤拷锟借备锟斤拷小锟侥简单诧拷锟街ｏ拷锟斤拷锟节匡拷始锟斤拷锟接的诧拷锟街★拷

前锟斤拷锟斤拷锟借备锟斤拷锟斤拷锟斤拷HORZSIZE锟斤拷VERTSIZE锟斤拷锟侥硷拷锟叫筹拷为锟斤拷锟皆猴拷锟阶计碉拷实锟斤拷萤幕锟侥匡拷锟饺★拷锟斤拷锟斤拷锟皆猴拷锟阶计碉拷实锟斤拷萤幕锟侥高度★拷锟斤拷锟斤拷/Platform SDK/Graphics锟斤拷Multimedia Services/GDI/Device Contexts/Device Context Reference/Device Context Functions/GetDeviceCaps锟叫ｏ拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷直锟接的讹拷锟藉。锟斤拷锟界，锟斤拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷锟斤拷示锟斤拷锟侥斤拷锟斤拷锟斤拷锟皆ｏ拷Windows锟斤拷锟斤拷锟斤拷锟街拷锟斤拷锟绞撅拷锟斤拷拇锟叫★拷兀锟斤拷锟斤拷锟斤拷锟斤拷台膝锟斤拷锟酵碉拷锟皆ｏ拷锟斤拷锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷式锟斤拷知锟斤拷准确锟斤拷萤幕锟斤拷小锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟解部锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷兀锟斤拷锟斤拷锟斤拷锟斤拷讯投影锟斤拷锟斤拷锟接碉拷锟斤拷锟斤拷锟斤拷锟截ｏ拷

锟斤拷Windows锟斤拷16位元锟芥本锟叫ｏ拷锟斤拷锟斤拷Windows NT锟叫ｏ拷锟斤拷Windows为HORZSIZE锟斤拷VERTSIZE使锟矫★拷锟斤拷准锟斤拷锟斤拷锟斤拷示锟斤拷小锟斤拷然锟斤拷锟斤拷锟斤拷Windows 95锟斤拷始锟斤拷HORZSIZE锟斤拷VERTSIZE值锟角达拷HORZRES锟斤拷VERTRES锟斤拷LOGPIXELSX锟斤拷LOGPIXELSY值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥★拷锟斤拷锟斤拷锟斤拷锟侥癸拷锟斤拷锟斤拷式锟斤拷

锟斤拷锟斤拷锟节★拷锟斤拷锟斤拷台锟斤拷锟斤拷使锟矫★拷锟斤拷示锟斤拷锟斤拷锟斤拷式选锟斤拷锟斤拷示锟斤拷图锟截达拷小时锟斤拷也锟斤拷锟斤拷选锟斤拷系统锟斤拷锟斤拷拇锟叫★拷锟斤拷锟斤拷选锟斤拷锟皆拷锟斤拷锟斤拷锟斤拷640锟斤拷480锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷1024锟斤拷768锟斤拷锟斤拷锟绞憋拷锟教★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷系统锟斤拷锟藉。锟斤拷些系统锟斤拷锟斤拷锟叫≈革拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟绞斤拷摹锟斤拷瓒拷锟揭筹拷锟斤拷签锟叫的★拷小锟斤拷锟藉」锟酵★拷锟斤拷锟斤拷锟藉」锟斤拷

锟节达拷统锟斤拷锟脚帮拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟侥革拷锟叫★拷伞锟斤拷恪癸拷锟绞撅拷锟�1锟斤拷锟皆�1/72英锟界，锟节碉拷锟斤拷锟脚帮拷锟斤拷1锟斤拷锟斤拷锟斤拷为1/72英锟界。

锟斤拷锟斤拷锟较ｏ拷锟斤拷锟斤拷牡锟街碉拷谴锟斤拷锟斤拷锟斤拷锟斤拷锟竭碉拷锟斤拷元锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷j锟斤拷p锟斤拷q锟斤拷y锟斤拷锟斤拷母锟铰诧拷锟斤拷锟斤拷元锟阶诧拷锟侥撅拷锟诫，锟斤拷锟叫诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟脚★拷锟斤拷锟界，锟斤拷10锟斤拷锟斤拷锟斤拷锟斤拷写司锟斤拷锟斤拷锟�10/72英锟界。锟斤拷锟斤拷TEXTMETRIC锟结构锟斤拷锟斤拷锟斤拷牡锟街碉拷锟斤拷tmHeight锟斤拷位锟斤拷去tmInternalLeading锟斤拷位锟斤拷锟斤拷图5-2锟斤拷示锟斤拷锟斤拷图锟斤拷锟斤拷一锟铰碉拷图4-3一锟斤拷锟斤拷锟斤拷

锟斤拷

图5-2 小锟斤拷锟斤拷锟絋EXTMETRIC锟斤拷位锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟脚帮拷锟叫ｏ拷锟斤拷锟斤拷牡锟街碉拷锟斤拷锟斤拷锟斤拷锟侥革拷锟绞碉拷蚀锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷锟斤拷元锟饺碉拷值指示锟斤拷要锟斤拷一些锟斤拷小一些锟斤拷锟较撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷强锟窖э拷锟�

TEXTMETRIC锟结构锟斤拷tmHeight锟斤拷位指锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟斤拷印锟斤拷锟斤拷锟较硷拷锟斤拷姆锟绞斤拷锟斤拷锟揭诧拷锟斤拷锟斤拷玫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷纾�12锟斤拷锟斤拷芯锟街革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷械幕锟阶硷拷锟接︼拷眉锟斤拷12/72锟斤拷锟斤拷1/6锟斤拷英锟界。锟斤拷应锟斤拷为10锟斤拷锟斤拷锟斤拷使锟斤拷10锟斤拷锟叫距，锟斤拷为锟斤拷锟街碉拷锟斤拷锟斤拷锟叫伙拷锟斤拷锟斤拷一锟斤拷

10锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷小锟�10锟斤拷锟斤拷锟斤拷宀伙拷锟届冻锟绞憋拷锟斤拷亩锟斤拷锟�

Windows系统锟斤拷锟藉－锟斤拷锟斤拷锟斤拷锟角达拷锟斤拷锟藉还锟斤拷小锟斤拷锟藉，也锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷锟斤拷锟狡低硷拷卮锟叫★拷锟斤拷潭锟斤拷锟斤拷锟轿�10锟斤拷锟斤拷锟斤拷锟�12锟斤拷锟叫距。锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷郑锟斤拷锟斤拷锟斤拷锟藉都锟斤拷10锟姐，为什么锟斤拷锟斤拷锟斤拷锟角筹拷为锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷兀锟�

锟斤拷锟斤拷牵锟� 锟斤拷锟斤拷锟节★拷锟斤拷锟斤拷台锟斤拷锟侥★拷锟斤拷示锟斤拷锟斤拷式锟斤拷选锟斤拷小锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷实锟斤拷锟斤拷锟斤拷选锟斤拷锟斤拷一锟斤拷锟劫讹拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷锟饺ｏ拷锟斤拷位锟斤拷每英锟斤拷牡锟斤拷锟� 锟斤拷锟斤拷选锟斤拷小锟斤拷锟斤拷时锟斤拷锟斤拷要Windows锟劫讹拷锟斤拷讯锟斤拷示锟斤拷锟斤拷锟斤拷为每英锟斤拷96锟姐。锟斤拷选锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷锟揭猈indows锟劫讹拷锟斤拷讯锟斤拷示锟斤拷锟斤拷锟斤拷为每英锟斤拷120锟姐。

锟劫匡拷锟斤拷图5-2锟斤拷锟斤拷锟斤拷小锟斤拷锟藉，锟斤拷锟斤拷锟捷碉拷锟斤拷示锟斤拷锟斤拷锟斤拷为每英锟斤拷96锟姐。锟斤拷说锟斤拷锟斤拷锟斤拷10锟斤拷锟斤拷锟藉。10锟姐即锟斤拷10/72英锟界，锟斤拷锟斤拷锟斤拷锟�96锟姐，每英锟斤拷锟脚撅拷为13图锟截★拷锟解即锟斤拷tmHeight锟斤拷去tmInternalLeading锟斤拷值锟斤拷锟叫撅拷锟斤拷12锟姐，锟斤拷12/72英锟界，锟斤拷锟斤拷锟斤拷96锟姐，每英锟斤拷锟轿�16图锟截★拷锟解即锟斤拷tmHeight锟斤拷值锟斤拷

图5-3锟斤拷示锟斤拷锟斤拷锟藉。锟斤拷锟斤拷锟斤拷锟斤拷每英锟斤拷120锟斤拷慕锟斤拷锟斤拷取锟酵拷锟斤拷锟斤拷锟斤拷锟�10锟斤拷锟斤拷锟藉，10/72锟斤拷锟斤拷120锟姐，每英锟斤拷锟斤拷16图锟截ｏ拷锟斤拷锟斤拷tmHeight锟斤拷tmInternalLeading锟斤拷值锟斤拷12锟斤拷锟叫撅拷锟斤拷20图锟截ｏ拷锟斤拷锟斤拷tmHeight锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷俅锟角匡拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟绞碉拷实亩锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥凤拷式锟斤拷锟斤拷要锟斤拷锟斤拷锟侥筹拷式锟叫对达拷写锟斤拷锟斤拷式锟斤拷锟斤拷

锟斤拷

图5-3 锟斤拷锟斤拷锟斤拷锟紽ONTMETRIC锟斤拷位

锟斤拷Windows锟斤拷式锟叫ｏ拷锟斤拷锟斤拷锟斤拷使锟斤拷GetDeviceCaps锟斤拷式取锟斤拷使锟斤拷锟斤拷锟节★拷锟斤拷锟斤拷台锟斤拷锟侥★拷锟斤拷示锟斤拷锟斤拷锟斤拷式锟斤拷选锟斤拷锟斤拷锟矫坑拷锟侥碉拷锟斤拷为锟斤拷位锟侥假讹拷锟斤拷锟斤拷锟饺★拷要锟矫碉拷锟斤拷些值锟斤拷锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵硷拷兀锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫┲碉拷遣锟酵拷模锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷锟絃OGPIXELSX锟斤拷LOGPIXELSY锟斤拷LOGPIXELS指锟竭硷拷图锟截ｏ拷锟斤拷锟侥伙拷锟斤拷锟斤拷思锟角★拷锟斤拷每英锟斤拷锟酵硷拷锟斤拷锟轿拷锟轿伙拷姆锟绞碉拷式锟斤拷锟斤拷取锟斤拷锟�

锟斤拷HORZSIZE锟斤拷VERTSIZE锟斤拷锟斤拷锟斤拷GetDeviceCaps锟矫碉拷锟斤拷锟借备锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟较筹拷为锟斤拷实锟斤拷萤幕锟侥匡拷锟饺ｏ拷锟斤拷位锟斤拷锟阶★拷锟斤拷锟斤拷实锟斤拷萤幕锟侥高度ｏ拷锟斤拷位锟斤拷锟阶★拷锟斤拷锟斤拷为锟斤拷些值锟角达拷HORZRES锟斤拷VERTRES锟斤拷LOGPIXELSX锟斤拷LOGPIXELSY值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷应锟矫筹拷为锟斤拷锟竭硷拷锟斤拷锟饺★拷锟酵★拷锟竭硷拷锟竭度★拷锟斤拷锟斤拷式锟角ｏ拷

锟斤拷

锟斤拷锟斤拷25.4锟斤拷於帮拷英锟斤拷转锟斤拷为锟斤拷锟阶★拷

锟解看锟斤拷锟斤拷锟斤拷锟街诧拷锟斤拷锟竭硷拷锟斤拷锟剿诧拷锟斤拷锟较撅拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟角匡拷锟斤拷锟矫筹拷锟皆猴拷锟斤拷为锟斤拷位锟侥达拷小锟斤拷锟斤拷锟斤拷锟角斤拷锟狡的ｏ拷锟斤拷锟斤拷锟侥★拷锟斤拷锟斤拷Windows 98锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷喾达拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟窖★拷锟斤拷锟斤拷示图锟截达拷小锟斤拷系统锟斤拷锟斤拷锟叫∥拷锟斤拷锟斤拷锟斤拷锟斤拷院锟斤拷锟轿拷锟轿伙拷锟斤拷锟绞撅拷锟叫★拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟酵硷拷卮锟叫★拷锟斤拷锟斤拷锟紾etDeviceCaps锟斤拷锟侥讹拷锟斤拷锟斤拷小锟斤拷锟斤拷锟斤拷什么锟斤拷锟斤拷锟截ｏ拷

锟斤拷浅锟斤拷锟斤拷锟斤拷濉ｏ拷俣锟斤拷锟揭伙拷锟�17英锟斤拷锟斤拷锟绞撅拷锟斤拷锟绞碉拷实锟斤拷锟绞撅拷锟叫★拷锟皆硷拷锟�12英锟斤拷锟�9英锟界。锟劫讹拷锟斤拷锟斤拷小要锟斤拷锟�640锟斤拷480图锟截达拷小锟斤拷执锟斤拷Windows锟斤拷锟斤拷锟斤拷味锟斤拷实锟绞的斤拷锟斤拷锟斤拷锟斤拷每英锟斤拷53锟姐。10锟斤拷锟斤拷锟藉（锟斤拷纸锟较憋拷锟斤拷亩锟斤拷锟斤拷锟接┠伙拷洗锟紸锟侥讹拷锟斤拷锟斤拷q锟侥底诧拷只锟斤拷7锟斤拷图锟截★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷芽锟斤拷锟斤拷也锟斤拷锥锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷诰傻锟紺olor Graphics Adapter锟斤拷执锟斤拷Windows锟斤拷锟斤拷锟角★拷锟斤拷

锟斤拷锟节ｏ拷锟斤拷锟斤拷锟侥碉拷锟皆斤拷锟斤拷锟斤拷讯投影锟斤拷锟斤拷投影锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷4英锟竭匡拷锟斤拷3英锟竭高★拷同锟斤拷锟斤拷640锟斤拷480图锟截达拷小锟斤拷锟斤拷锟角达拷约每英锟斤拷13锟斤拷慕锟斤拷锟斤拷取锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵硷拷锟绞�10锟斤拷锟斤拷锟斤拷锟斤拷呛芸锟叫︼拷摹锟�

10锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷应锟角可讹拷锟侥ｏ拷锟斤拷为锟斤拷锟斤拷锟斤拷印时锟角肯讹拷锟缴讹拷锟侥★拷锟斤拷锟斤拷10锟斤拷锟斤拷锟斤拷统锟轿伙拷锟斤拷锟揭拷牟锟斤拷铡锟斤拷锟絎indows应锟矫筹拷式确锟斤拷10锟斤拷萤幕锟斤拷锟斤拷为平锟斤拷锟斤拷小时锟斤拷锟斤拷锟杰癸拷使锟斤拷8锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷小锟斤拷锟斤拷锟街ｏ拷锟皆可讹拷锟斤拷锟斤拷锟斤拷锟矫达拷锟�10锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷洗锟斤拷锟斤拷锟街★拷锟斤拷锟斤拷锟斤拷锟狡碉拷锟斤拷锟斤拷龋锟斤拷锟矫坑拷锟侥碉拷锟斤拷为锟斤拷位锟斤拷锟斤拷10锟斤拷锟斤拷锟斤拷锟酵硷拷卮锟叫★拷锟饺凤拷锟斤拷呛锟斤拷锟斤拷锟斤拷锟侥★拷

然锟斤拷锟斤拷锟斤拷Windows NT锟叫ｏ拷锟斤拷锟较的凤拷锟斤拷锟斤拷锟斤拷HORZSIZE锟斤拷VERTSIZE值锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷Windows锟斤拷16位元锟芥本一锟铰★拷HORZRES锟斤拷VERTRES值锟斤拷然锟斤拷示水平锟酵达拷直图锟截碉拷锟斤拷值锟斤拷LOGPIXELSX锟斤拷LOGPIXELSY锟斤拷然锟斤拷锟节★拷锟斤拷锟斤拷台锟斤拷锟侥★拷锟斤拷示锟斤拷锟斤拷锟斤拷式锟斤拷选锟斤拷锟斤拷锟斤拷锟斤拷泄亍锟斤拷锟絎indows 98锟叫ｏ拷LOGPIXELSX锟斤拷LOGPIXELSY锟侥碉拷锟斤拷值锟斤拷96锟斤拷120 dpi锟斤拷锟斤拷取锟斤拷锟斤拷锟窖★拷锟斤拷锟斤拷小锟斤拷锟藉还锟角达拷锟斤拷锟藉。

锟斤拷Windows NT锟叫碉拷锟斤拷锟斤拷锟斤拷HORZSIZE锟斤拷VERTSIZE值锟教讹拷锟斤拷示锟斤拷准锟斤拷示锟斤拷锟斤拷小锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟绞撅拷锟斤拷锟饺★拷玫锟紿ORZSIZE锟斤拷VERTSIZE值锟街憋拷锟斤拷320锟斤拷240锟斤拷锟阶★拷锟斤拷些值锟斤拷锟斤拷同锟侥ｏ拷锟斤拷选锟斤拷锟酵硷拷卮锟叫★拷薰亍锟斤拷锟剿ｏ拷锟斤拷些值锟斤拷锟斤拷HORZRES锟斤拷VERTRES锟斤拷LOGPIXELSX锟斤拷LOGPIXELSY锟斤拷锟斤拷锟斤拷GetDeviceCaps锟叫得碉拷锟斤拷值锟斤拷同锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷墓锟绞斤拷锟斤拷锟斤拷锟絎indows 98锟铰碉拷HORZSIZE锟斤拷VERTSIZE值锟斤拷

锟斤拷锟斤拷锟绞斤拷锟揭碉拷实锟斤拷锟窖讹拷锟绞撅拷锟叫★拷锟斤拷锟矫达拷欤恳诧拷锟斤拷锟矫的斤拷锟斤拷锟斤拷锟斤拷锟斤拷枚曰锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷恰锟�

锟斤拷锟结，锟斤拷锟斤拷GetDeviceCaps锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷讯锟斤拷小锟叫关★拷ASPECTX锟斤拷ASPECTY锟斤拷ASPECTXY值锟斤拷每一锟斤拷图锟截碉拷锟斤拷钥锟斤拷取锟斤拷叨群投越锟斤拷叽锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷氲斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟截ｏ拷ASPECTX锟斤拷ASPECTY值锟斤拷同锟斤拷锟斤拷锟斤拷锟斤拷危锟紸SPECTXY值应锟斤拷锟紸SPECTX锟斤拷ASPECTY平锟斤拷锟酵碉拷平锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷

锟斤拷锟缴拷锟�
锟斤拷

锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷锟斤拷锟绞撅拷锟缴硷拷睾桶锟缴硷拷兀锟斤拷锟矫匡拷锟酵硷拷锟街伙拷锟揭拷锟斤拷锟斤拷锟斤拷械锟揭晃辉拷锟斤拷锟缴拷锟绞撅拷锟斤拷锟矫匡拷锟酵硷拷锟斤拷锟揭拷锟斤拷位元锟斤拷位元锟斤拷越锟洁，色锟斤拷越锟洁，锟斤拷锟竭革拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷锟酵憋拷锟绞撅拷牟锟酵拷实锟斤拷锟侥匡拷锟斤拷2锟斤拷位元锟斤拷锟轿凤拷锟斤拷

锟斤拷Full-Color锟斤拷锟斤拷讯锟斤拷示锟斤拷锟侥斤拷锟斤拷锟斤拷锟斤拷每锟斤拷图锟斤拷24位元锟斤拷8位元锟斤拷色锟斤拷8位元锟斤拷色锟皆硷拷8位元锟斤拷色锟斤拷锟届、锟教★拷锟斤拷锟斤拷锟斤拷色锟斤拷锟斤拷原色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷只锟斤拷锟斤拷锟缴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟缴拷锟斤拷锟酵拷锟斤拷糯缶悼锟斤拷锟绞灸伙拷锟斤拷涂锟斤拷钥锟斤拷锟斤拷锟斤拷锟�

锟斤拷High-Color锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷每锟斤拷图锟斤拷16位元锟斤拷5位元锟斤拷色锟斤拷6位元锟斤拷色锟皆硷拷5位元锟斤拷色锟斤拷锟斤拷色锟斤拷一位元锟斤拷锟斤拷为锟斤拷锟桔讹拷锟斤拷色锟斤拷锟斤拷锟斤拷一些锟斤拷

锟斤拷示256锟斤拷锟斤拷色锟斤拷锟斤拷示锟斤拷每锟斤拷图锟斤拷锟斤拷要8位元锟斤拷然锟斤拷锟斤拷锟斤拷些8位元锟斤拷值一锟斤拷锟缴讹拷锟斤拷实锟斤拷锟斤拷色锟侥碉拷色锟斤拷锟斤拷织锟侥★拷锟揭伙拷锟节碉拷十锟斤拷锟斤拷锟斤拷细锟斤拷锟斤拷锟斤拷锟斤拷锟角★拷

锟斤拷锟结，锟斤拷示16锟斤拷锟斤拷色锟斤拷锟斤拷示锟斤拷每锟斤拷图锟斤拷锟斤拷要4位元锟斤拷锟斤拷16锟斤拷锟斤拷色一锟斤拷潭锟斤拷锟轿拷锟斤拷幕锟斤拷锟斤拷暮臁拷凇锟斤拷锟斤拷锟斤拷唷拷稀锟斤拷啤锟斤拷锟斤拷只锟缴拷锟斤拷锟�16锟斤拷锟斤拷色要锟斤拷锟捷碉拷锟斤拷式锟斤拷IBM CGA锟斤拷

只锟斤拷锟斤拷某些锟斤拷锟斤拷某锟绞斤拷胁锟斤拷锟揭拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷系募锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷织锟侥ｏ拷锟斤拷锟斤拷GetDeviceCaps使锟斤拷式写锟斤拷锟竭匡拷锟斤拷知锟斤拷锟斤拷示锟斤拷锟侥达拷锟斤拷锟斤拷织锟皆硷拷锟斤拷锟杰癸拷锟斤拷示锟斤拷色锟斤拷锟斤拷目锟斤拷锟斤拷锟斤拷暮锟斤拷写锟斤拷锟缴拷锟狡斤拷锟斤拷锟斤拷目锟斤拷

iPlanes = GetDeviceCaps (hdc, PLANES) ;

锟斤拷锟斤拷暮锟斤拷写锟斤拷锟矫匡拷锟酵硷拷氐锟缴拷锟轿辉拷锟斤拷锟�

iBitsPixel = GetDeviceCaps (hdc, BITSPIXEL) ;

锟斤拷锟斤拷锟斤拷锟缴硷拷锟斤拷锟绞撅拷璞甘癸拷枚锟斤拷色锟斤拷平锟斤拷锟矫客硷拷锟斤拷卸锟斤拷色锟斤拷位元锟斤拷锟斤拷疲锟斤拷锟斤拷遣锟斤拷锟酵币伙拷锟绞癸拷锟斤拷锟斤拷锟斤拷址锟绞斤拷锟斤拷锟斤拷浠八碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷斜锟斤拷锟揭伙拷锟斤拷锟斤拷锟�1锟斤拷锟斤拷示锟斤拷锟杰癸拷锟斤拷示锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰癸拷式锟斤拷锟斤拷锟姐：

iColors = 1 << (iPlanes * iBitsPixel) ;

锟斤拷锟街碉拷锟斤拷锟絅UMCOLORS锟斤拷锟斤拷锟矫碉拷锟斤拷色锟斤拷锟斤拷值锟斤拷锟斤拷一锟斤拷锟斤拷也锟斤拷锟杰诧拷一锟斤拷锟斤拷

iColors = GetDeviceCaps (hdc, NUMCOLORS) ;

锟斤拷锟结到锟斤拷锟斤拷256色锟斤拷锟斤拷示锟斤拷使锟斤拷色锟绞碉拷色锟教★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拢锟斤拷锟絅UMCOLORS为锟斤拷锟斤拷时锟斤拷GetDeviceCaps锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷色锟斤拷锟斤拷锟斤拷值为20锟斤拷剩锟斤拷锟�236锟斤拷锟斤拷色锟斤拷锟斤拷锟斤拷Windows锟斤拷式锟矫碉拷色锟教癸拷锟斤拷锟斤拷锟借定锟斤拷锟斤拷锟紿igh-Color锟斤拷True-Color锟斤拷示锟斤拷锟斤拷锟饺ｏ拷锟斤拷锟斤拷NUMCOLORS锟斤拷锟斤拷锟斤拷GetDeviceCaps通锟斤拷锟斤拷锟斤拷-1锟斤拷锟斤拷锟斤拷锟斤拷锟睫凤拷锟矫碉拷锟斤拷要锟斤拷锟斤拷讯锟斤拷锟斤拷锟接︼拷锟绞癸拷锟角帮拷锟斤拷锟绞撅拷拇锟斤拷锟絇LANES锟斤拷BITSPIXEL值锟斤拷iColors锟斤拷式锟斤拷

锟节达拷锟斤拷锟紾DI锟斤拷式锟斤拷锟斤拷锟叫ｏ拷使锟斤拷COLORREF值锟斤拷只锟斤拷一锟斤拷32位元锟斤拷锟斤拷锟斤拷锟斤拷锟脚筹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示一锟斤拷色锟绞★拷COLORREF值锟斤拷锟秸红、锟教猴拷锟斤拷色锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷一锟斤拷锟斤拷色锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷RGB色锟绞★拷锟斤拷32位元锟斤拷COLORREF值锟斤拷锟借定锟斤拷图5-4锟斤拷示锟斤拷

锟斤拷

图5-4 32位COLORREF值

注锟斤拷锟斤拷前锟斤拷锟角憋拷为0锟斤拷8锟斤拷位元锟斤拷锟斤拷锟斤拷每锟斤拷原色锟斤拷指锟斤拷为一锟斤拷8位元锟斤拷值锟斤拷锟斤拷锟斤拷锟较ｏ拷COLORREF锟斤拷锟斤拷指锟斤拷锟斤拷锟侥讹拷十锟侥次凤拷锟街伙拷一千锟斤拷锟斤拷锟斤拷锟斤拷色锟绞★拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷懦锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟斤拷锟絉GB色锟绞★拷锟斤拷Windows锟斤拷头锟斤拷锟斤拷WINGDI.H锟结供锟剿硷拷锟斤拷使锟斤拷RGB色锟斤拷值锟侥巨硷拷锟斤拷RGB锟睫硷拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街憋拷锟斤拷锟斤拷臁拷毯锟斤拷锟街碉拷锟饺伙拷峤拷锟斤拷锟斤拷锟斤拷为一锟斤拷锟斤拷锟斤拷锟斤拷锟脚筹拷锟斤拷锟斤拷锟斤拷

#define RGB(r,g,b) ((COLORREF)(((BYTE)(r) | \
			((WORD)((BYTE)(g)) << 8)) | \
			(((DWORD)(BYTE)(b)) << 16)))

注锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷顺锟斤拷锟角红、锟教猴拷锟斤拷锟斤拷锟斤拷耍锟街碉拷锟�

RGB (255, 255, 0)

锟斤拷0x0000FFFF锟斤拷锟斤拷锟缴拷锟斤拷锟缴拷锟斤拷锟缴拷暮铣桑锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷瓒ㄎ�0时锟斤拷色锟斤拷为锟斤拷色锟斤拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟借定为255时锟斤拷色锟斤拷为锟斤拷色锟斤拷GetRValue锟斤拷GetGValue锟斤拷GetBValue锟睫硷拷锟斤拷COLORREF值锟叫筹拷取锟斤拷原色值锟斤拷锟斤拷锟斤拷锟斤拷使锟矫达拷锟斤拷RGB色锟斤拷值锟斤拷Windows锟斤拷式时锟斤拷锟斤拷些锟睫硷拷锟斤拷时锟斤拷芊锟斤拷恪�

锟斤拷16色锟斤拷256色锟斤拷示锟斤拷锟较ｏ拷Windows锟斤拷锟斤拷使锟矫★拷锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷璞革拷芄锟斤拷锟绞撅拷锟斤拷锟缴拷锟斤拷色锟绞★拷锟斤拷色锟斤拷锟斤拷锟斤拷锟缴讹拷锟斤拷色锟绞碉拷图锟斤拷锟斤拷傻锟酵硷拷锟酵硷拷锟斤拷锟斤拷锟斤拷院锟斤拷锟紾etNearestColor锟斤拷锟斤拷锟斤拷锟斤拷某一色锟斤拷锟斤拷咏锟斤拷拇锟缴拷锟�

crPureColor = GetNearestColor (hdc, crColor) ;

装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
锟斤拷

前锟斤拷锟窖撅拷锟结到锟斤拷锟斤拷Windows使锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI锟斤拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷尾锟斤拷锟斤拷摹锟斤拷锟斤拷浴锟斤拷锟斤拷锟斤拷纾拷锟斤拷锟絋extOut锟斤拷式锟斤拷示锟斤拷锟斤拷时锟斤拷锟斤拷式写锟斤拷锟竭诧拷锟斤拷指锟斤拷锟斤拷锟街碉拷色锟绞猴拷锟斤拷锟藉，Windows锟斤拷装锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷锟斤拷锟窖讹拷锟�

锟斤拷式取锟斤拷一锟斤拷装锟斤拷锟斤拷锟捷的达拷锟斤拷时锟斤拷Windows锟斤拷预锟斤拷值锟借定锟斤拷锟叫碉拷锟斤拷锟皆ｏ拷锟斤拷锟斤拷一锟节会看锟斤拷锟斤拷锟饺★拷锟斤拷锟斤拷锟斤拷瓒拷锟斤拷锟斤拷锟�5-1锟叫筹拷锟斤拷Windows 98支援锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟皆ｏ拷锟斤拷式锟斤拷锟皆改憋拷锟斤拷锟饺★拷锟斤拷魏锟揭伙拷锟斤拷锟斤拷浴锟�

锟斤拷5-1

装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷	预锟斤拷值	锟睫改革拷值锟侥猴拷式	取锟矫革拷值锟侥猴拷式
Mapping Mode	MM_TEXT	SetMapMode	GetMapMode
Window Origin	(0, 0)	SetWindowOrgEx OffsetWindowOrgEx	GetWindowOrgEx
Viewport Origin	(0, 0)	SetViewportOrgEx OffsetViewportOrgEx	GetViewportOrgEx
Window Extents	(1, 1)	SetWindowExtEx SetMapMode ScaleWindowExtEx	GetWindowExtEx
Viewport Extents	(1, 1)	SetViewportExtEx SetMapMode ScaleViewportExtEx	GetViewportExtEx
Pen	BLACK_PEN	SelectObject	SelectObject
Brush	WHITE_BRUSH	SelectObject	SelectObject
Font	SYSTEM_FONT	SelectObject	SelectObject
Bitmap	None	SelectObject	SelectObject
Current Position	(0, 0)	MoveToEx LineTo PolylineTo PolyBezierTo	GetCurrentPositionEx
Background Mode	OPAQUE	SetBkMode	GetBkMode
Background Color	White	SetBkColor	GetBkColor
Text Color	Black	SetTextColor	GetTextColor
Drawing Mode	R2_COPYPEN	SetROP2	GetROP2
Stretching Mode	BLACKONWHITE	SetStretchBltMode	GetStretchBltMode
Polygon Fill Mode	ALTERNATE	SetPolyFillMode	GetPolyFillMode
Intercharacter Spacing	0	SetTextCharacterExtra	GetTextCharacterExtra
Brush Origin	(0, 0)	SetBrushOrgEx	GetBrushOrgEx
Clipping Region	None	SelectObject SelectClipRgn IntersectClipRgn OffsetClipRgn ExcludeClipRect SelectClipPath	GetClipBox

锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷
锟斤拷

通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GetDC锟斤拷BeginPaint时锟斤拷Windows锟斤拷预锟斤拷值锟斤拷锟斤拷一锟斤拷锟铰碉拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟叫改憋拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷ReleaseDC锟斤拷EndPaint锟斤拷锟斤拷锟酵凤拷时锟斤拷锟斤拷锟结丢失锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷锟揭癸拷梅锟斤拷诙锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷裕锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫匡拷锟饺★拷锟阶帮拷锟斤拷锟斤拷荽锟斤拷锟绞憋拷锟绞硷拷锟阶帮拷锟斤拷锟斤拷荩锟�

case WM_PAINT:
     hdc = BeginPaint (hwnd, &ps) ; 
     装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
     锟斤拷锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷
     EndPaint (hwnd, &ps) ;
     return 0 ;

锟斤拷然锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷址锟斤拷锟斤拷丫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷耍锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷头锟阶帮拷锟斤拷锟斤拷锟街拷幔拷锟饺伙拷锟斤拷锟斤拷式锟叫讹拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥改变，锟皆憋拷锟斤拷锟斤拷一锟轿猴拷锟斤拷GetDC锟斤拷BeginPaint时锟斤拷锟斤拷锟斤拷然锟杰癸拷锟斤拷锟斤拷锟矫★拷为锟剿ｏ拷锟斤拷锟节碉拷录锟接达拷锟斤拷锟绞憋拷锟斤拷锟紺S_OWNDC锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟揭伙拷锟斤拷郑锟�

wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC ;

锟斤拷锟节ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷每锟斤拷锟接达拷锟斤拷锟斤拷拥锟斤拷锟皆硷拷锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷一直锟斤拷锟节ｏ拷直锟斤拷锟接达拷锟斤拷删锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟紺S_OWNDC锟斤拷瘢锟街伙拷锟斤拷始锟斤拷装锟斤拷锟斤拷锟斤拷一锟轿ｏ拷锟斤拷锟斤拷锟节达拷锟斤拷WM_CREATE讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟�

case 	WM_CREATE:
 	    hdc = GetDC (hwnd) ; 
锟斤拷始锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

	    ReleaseDC (hwnd, hdc) ;

锟斤拷些锟斤拷锟斤拷锟节改憋拷之前一直锟斤拷效锟斤拷

CS_OWNDC锟斤拷锟街挥帮拷锟紾etDC锟斤拷BeginPaint锟斤拷玫锟阶帮拷锟斤拷锟斤拷荩锟斤拷锟接帮拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟紾etWindowDC锟斤拷锟斤拷玫锟阶帮拷锟斤拷锟斤拷荨锟斤拷锟角帮拷锟斤拷岢癸拷锟紺S_OWNDC锟斤拷锟斤拷锟轿拷锟斤拷锟揭拷锟斤拷锟斤拷澹伙拷锟斤拷冢锟斤拷诖锟斤拷锟斤拷锟斤拷锟酵硷拷蔚锟絎indows NT应锟矫筹拷式锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷堋锟斤拷锟绞癸拷锟斤拷锟紺S_OWNDC锟斤拷锟斤拷锟斤拷然应锟斤拷锟斤拷锟剿筹拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式之前锟酵凤拷装锟斤拷锟斤拷锟捷★拷

某些锟斤拷锟斤拷拢锟斤拷锟斤拷锟斤拷锟斤拷锟侥憋拷某些装锟斤拷锟斤拷锟斤拷锟斤拷锟皆ｏ拷锟矫改憋拷锟斤拷锟斤拷锟斤拷越锟斤拷谢锟酵硷拷锟饺伙拷锟街革拷原锟斤拷锟斤拷装锟斤拷锟斤拷锟捷★拷要锟斤拷锟斤拷一锟斤拷锟教ｏ拷锟斤拷锟斤拷通锟斤拷锟斤拷锟铰猴拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷碉拷状态锟斤拷

idSaved = SaveDC (hdc) ;

锟斤拷锟节ｏ拷锟斤拷锟皆改憋拷一些锟斤拷锟皆ｏ拷锟斤拷锟斤拷要锟截碉拷锟斤拷锟斤拷SaveDC前锟斤拷锟节碉拷装锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟叫ｏ拷

RestoreDC (hdc, idSaved) ;

锟斤拷锟斤拷锟斤拷锟节猴拷锟斤拷RestoreDC之前锟斤拷锟斤拷SaveDC锟斤拷锟轿★拷

锟斤拷锟斤拷锟斤拷锟绞叫达拷锟斤拷锟斤拷圆锟酵拷姆锟绞绞癸拷锟絊aveDC锟斤拷RestoreDC锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷械锟絇USH锟斤拷POP指锟筋，锟斤拷锟斤拷锟斤拷锟斤拷SaveDC时锟斤拷锟斤拷锟斤拷要锟斤拷锟芥传锟斤拷值锟斤拷

SaveDC (hdc) ;

然锟结，锟斤拷锟斤拷锟皆革拷锟斤拷某些锟斤拷锟皆诧拷锟劫次猴拷锟斤拷SaveDC锟斤拷要锟斤拷装锟斤拷锟斤拷锟捷恢革拷锟斤拷一锟斤拷锟窖撅拷锟斤拷锟斤拷锟阶刺拷锟斤拷锟斤拷校锟�

RestoreDC (hdc, -1) ;

锟斤拷徒锟阶帮拷锟斤拷锟斤拷莼指锟斤拷锟斤拷锟斤拷锟斤拷SaveDC锟斤拷式锟斤拷锟斤拷锟阶刺拷小锟�

锟斤拷锟斤拷锟斤拷锟�
锟斤拷

锟节碉拷一锟铰ｏ拷锟斤拷锟斤拷谈锟桔癸拷Windows图锟斤拷装锟矫斤拷锟芥将图锟斤拷锟斤拷锟斤拷璞革拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷姆锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷希锟街灰拷峁㏒etPixel锟斤拷GetPixel锟斤拷式锟斤拷锟酵匡拷锟斤拷使锟斤拷图锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷一锟叫讹拷锟斤拷锟剿★拷锟斤拷锟斤拷锟揭伙拷卸锟斤拷锟斤拷锟绞癸拷锟紾DI模锟斤拷锟斤拷实锟斤拷锟侥革拷锟竭阶的筹拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟界，锟斤拷锟斤拷时锟斤拷只锟斤拷GDI锟斤拷锟斤拷SetPixel锟斤拷锟轿ｏ拷锟斤拷锟绞碉拷锟截碉拷锟斤拷x锟斤拷y锟斤拷锟疥。

锟斤拷实锟斤拷锟斤拷锟斤拷校锟揭诧拷锟饺凤拷锟斤拷越锟绞癸拷锟絊etPixel锟斤拷GetPixel锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟轿何伙拷锟狡★拷锟斤拷也锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷式锟侥伙拷锟斤拷锟斤拷锟斤拷瞥锟斤拷锟斤拷凸锟斤拷锟斤拷锟斤拷玫锟酵硷拷伪锟斤拷系统锟斤拷唯一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟杰★拷锟斤拷锟揭伙拷锟斤拷锟绞酵拷锟斤拷锟斤拷魏锟斤拷胁锟斤拷艿锟斤拷锟絊etPixel锟斤拷式锟斤拷锟斤拷么锟斤拷执锟斤拷锟斤拷锟斤拷锟斤拷浅锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷图锟斤拷系统锟斤拷锟竭和斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接碉拷图锟轿诧拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷式锟侥诧拷锟斤拷希锟斤拷锟斤拷突锟斤拷锟斤拷效锟矫多，锟斤拷为装锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟叫╋拷锟斤拷锟斤拷某锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷鸦锟斤拷锟斤拷锟斤拷猓恍╋拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟酵硷拷胃锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖队诧拷锟斤拷约锟斤拷锟斤拷锟酵硷拷巍锟�

锟借定图锟斤拷
锟斤拷

锟斤拷使Windows GDI锟斤拷锟斤拷锟斤拷SetPixel锟斤拷GetPixel锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟角★拷锟节憋拷锟介，锟斤拷锟节碉拷锟斤拷锟铰碉拷CONNECT锟斤拷式锟斤拷使锟斤拷锟斤拷SetPixel锟斤拷式锟斤拷锟斤拷锟节第帮拷锟铰碉拷WHATCLR锟斤拷式锟斤拷使锟斤拷锟斤拷GetPixel锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷耍锟斤拷锟斤拷锟斤拷强锟绞硷拷锟斤拷芯锟酵硷拷锟斤拷锟斤拷欠浅锟斤拷锟斤拷恪�

SetPixel锟斤拷式锟斤拷指锟斤拷锟斤拷x锟斤拷y锟斤拷锟斤拷锟斤拷锟截讹拷锟斤拷锟斤拷色锟借定图锟截ｏ拷

SetPixel (hdc, x, y, crColor) ;

锟斤拷同锟斤拷锟轿何伙拷图锟斤拷式锟斤拷一锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷的达拷锟脚★拷锟节讹拷锟斤拷锟酵碉拷锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷位锟矫★拷通锟斤拷要锟斤拷锟斤拷哟锟斤拷锟绞撅拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟斤拷x锟斤拷y锟斤拷锟斤拷诟锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟较角★拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷COLORREF锟斤拷态指锟斤拷锟斤拷锟斤拷色锟斤拷锟斤拷锟斤拷诤锟绞斤拷锟街革拷锟斤拷锟斤拷锟缴拷锟窖讹拷锟绞撅拷锟斤拷锟街г拷锟斤拷锟绞斤拷锟酵硷拷锟斤拷瓒ㄎ拷锟接斤拷锟侥达拷色锟斤拷锟接猴拷式锟斤拷锟截革拷值锟斤拷

GetPixel锟斤拷式锟斤拷锟斤拷指锟斤拷锟斤拷锟疥处锟斤拷图锟斤拷锟斤拷色锟斤拷

crColor = GetPixel (hdc, x, y) ;

直锟斤拷
锟斤拷

Windows锟斤拷锟皆伙拷直锟竭★拷锟斤拷圆锟竭ｏ拷锟斤拷圆圆锟斤拷锟较碉拷锟斤拷锟竭ｏ拷锟酵憋拷锟斤拷锟斤拷锟斤拷锟竭★拷Windows 98支援锟斤拷7锟斤拷锟斤拷锟竭猴拷式锟角ｏ拷

LineTo 锟斤拷直锟竭★拷
锟斤拷
Polyline锟斤拷PolylineTo 锟斤拷一系锟斤拷锟斤拷锟斤拷锟斤拷直锟竭★拷
锟斤拷
PolyPolyline 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭★拷
锟斤拷
Arc 锟斤拷锟斤拷圆锟竭★拷
锟斤拷
PolyBezier锟斤拷PolyBezierTo 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭★拷
锟斤拷
锟斤拷锟解，Windows NT锟斤拷支援3锟街伙拷锟竭猴拷式锟斤拷
ArcTo锟斤拷AngleArc 锟斤拷锟斤拷圆锟竭★拷
锟斤拷
PolyDraw 锟斤拷一系锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭★拷
锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷式Windows 98锟斤拷支援锟斤拷

锟节憋拷锟铰碉拷锟斤拷锟斤拷锟揭斤拷锟斤拷锟斤拷一些锟饺伙拷锟斤拷也锟斤拷锟斤拷锟斤拷锟斤拷图锟轿的凤拷锟斤拷锟斤拷锟侥猴拷式锟斤拷锟斤拷些锟斤拷式锟角ｏ拷
Rectangle 锟斤拷锟斤拷锟轿★拷
锟斤拷
Ellipse 锟斤拷锟斤拷圆锟斤拷
锟斤拷
RoundRect 锟斤拷锟斤拷圆锟角的撅拷锟轿★拷
锟斤拷
Pie 锟斤拷锟斤拷圆锟斤拷一锟斤拷锟街ｏ拷使锟戒看锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟轿★拷
锟斤拷
Chord 锟斤拷锟斤拷圆锟斤拷一锟斤拷锟街ｏ拷锟皆呈癸拷锟轿★拷
锟斤拷

装锟斤拷锟斤拷锟捷碉拷锟斤拷锟斤拷锟斤拷锟接帮拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟绞斤拷锟斤拷锟斤拷叩锟斤拷锟桔ｏ拷目前锟斤拷锟绞碉拷位锟矫ｏ拷锟斤拷锟斤拷锟絃ineTo锟斤拷PolylineTo锟斤拷PolyBezierTo锟斤拷ArcTo 锟斤拷锟斤拷锟斤拷锟绞★拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷色锟酵伙拷图模式锟斤拷

锟斤拷一锟斤拷直锟竭ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟揭伙拷锟斤拷锟绞街革拷锟斤拷锟斤拷叩目锟绞硷拷悖拷诙锟斤拷锟斤拷锟绞街革拷锟斤拷锟斤拷叩锟斤拷盏悖�

MoveToEx (hdc, xBeg, yBeg, NULL) ;
LineTo (hdc, xEnd, yEnd) ;

MoveToEx实锟斤拷锟较诧拷锟结画锟竭ｏ拷锟斤拷只锟斤拷锟借定锟斤拷装锟斤拷锟斤拷锟捷的★拷目前位锟矫★拷锟斤拷锟皆★拷然锟斤拷LineTo锟斤拷式锟斤拷目前锟斤拷位锟矫碉拷锟斤拷锟斤拷指锟斤拷锟侥点画一锟斤拷直锟竭★拷目前位锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI锟斤拷式锟侥匡拷始锟姐。锟斤拷锟节讹拷锟斤拷装锟斤拷锟斤拷锟斤拷锟叫ｏ拷目前位锟斤拷锟斤拷锟斤拷瓒拷诘悖�0,0锟斤拷锟斤拷锟斤拷锟斤拷诤锟斤拷锟絃ineTo之前没锟斤拷锟借定目前位锟矫ｏ拷锟斤拷么锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖强锟绞硷拷锟斤拷摺锟�

小锟斤拷史锟斤拷

Windows锟斤拷16位元锟芥本锟叫ｏ拷锟斤拷锟斤拷锟侥憋拷目前位锟矫的猴拷式锟斤拷MoveTo锟斤拷锟矫猴拷式只锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷x锟斤拷y锟斤拷锟疥。锟斤拷式通锟斤拷锟斤拷锟斤拷16位元锟斤拷拼锟缴碉拷32位元锟斤拷锟斤拷锟斤拷锟脚筹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷前锟斤拷目前位锟矫★拷然锟斤拷锟斤拷锟斤拷Windows锟斤拷32位元锟芥本锟叫ｏ拷锟斤拷锟斤拷锟斤拷32位元锟斤拷锟斤拷值锟斤拷锟斤拷C锟斤拷32位元锟芥本锟斤拷锟斤拷没锟叫讹拷锟斤拷64位元锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷态锟斤拷锟斤拷锟斤拷锟斤拷指谋锟斤拷锟轿讹拷锟組oveTo锟斤拷锟戒传锟斤拷值锟叫诧拷锟斤拷指锟斤拷锟斤拷前锟斤拷目前位锟矫★拷锟斤拷实锟绞的筹拷式写锟斤拷锟叫ｏ拷锟斤拷MoveTo锟斤拷锟截碉拷值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷锟斤拷司锟斤拷锟揭伙拷锟斤拷潞锟绞斤拷锟斤拷锟斤拷锟斤拷MoveToEx锟斤拷

MoveToEx锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷POINT锟结构锟斤拷指锟疥。锟接该猴拷式锟斤拷锟斤拷锟结，POINT锟结构锟斤拷x锟斤拷y锟斤拷位指锟斤拷锟斤拷锟斤拷前锟斤拷目前位锟矫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷锟窖讹拷锟酵拷锟斤拷锟剿ｏ拷锟斤拷锟斤拷锟皆简单碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷瓒ㄎ狽ULL锟斤拷

锟斤拷锟芥：

锟斤拷锟斤拷Windows 98锟叫碉拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷32位元锟侥ｏ拷实锟斤拷锟斤拷却只锟矫碉拷锟剿碉拷16位元锟斤拷锟斤拷锟斤拷值实锟斤拷锟较憋拷锟斤拷锟斤拷锟斤拷-32,768锟斤拷32,767之锟戒。锟斤拷Windows NT锟叫ｏ拷使锟斤拷锟斤拷锟斤拷锟斤拷32位元值锟斤拷

锟斤拷锟斤拷锟斤拷锟揭壳拔伙拷茫锟斤拷涂锟斤拷锟酵拷锟斤拷锟斤拷潞锟斤拷谢锟矫ｏ拷

GetCurrentPositionEx (hdc, &pt) ;

锟斤拷锟叫ｏ拷pt锟斤拷POINT锟结构锟侥★拷

锟斤拷锟斤拷某锟绞斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟较角匡拷始锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫伙拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷锟�100锟斤拷图锟截ｏ拷锟斤拷锟斤拷hwnd锟斤拷锟接达拷锟斤拷锟脚ｏ拷hdc锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷x锟斤拷y锟斤拷锟斤拷锟斤拷锟斤拷

GetClientRect (hwnd, &rect) ;
for (	x = 0 ; x < rect.right ; x+= 100)
{
	MoveToEx (hdc, x, 0, NULL) ;
   	LineTo (hdc, x, rect.bottom) ;
}
for (y = 0 ; y < rect.bottom ; y += 100)
{
	MoveToEx (hdc, 0, y, NULL) ;
	LineTo (hdc, rect.right, y) ;
}

锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷一锟斤拷直锟斤拷锟皆碉拷锟斤拷些锟介烦锟斤拷锟斤拷锟斤拷锟斤拷希锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷直锟斤拷时锟斤拷目前锟斤拷锟斤拷位锟斤拷锟斤拷锟斤拷锟街伙拷锟矫猴拷锟斤拷锟矫★拷锟斤拷锟界，锟斤拷锟斤拷锟斤拷锟诫定锟斤拷一锟斤拷锟斤拷锟斤拷5锟斤拷锟姐（10锟斤拷值锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷一锟斤拷锟斤拷锟轿的边斤拷锟�

POINT apt[5] = { 100, 100, 200, 100, 200, 200, 100, 200, 100, 100 } ;

注锟解，锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷冢锟街伙拷锟揭癸拷锟組oveToEx锟狡碉拷锟斤拷一锟斤拷锟姐，锟斤拷锟斤拷锟斤拷锟斤拷牡锟绞癸拷锟絃ineTo锟斤拷

MoveToEx (hdc, apt[0].x, apt[0].y, NULL) ;
for (	i = 1 ; i < 5 ; i++)
	LineTo (hdc, apt[i].x, apt[i].y) ;

锟斤拷锟絃ineTo锟斤拷目前位锟矫伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷LineTo锟斤拷式锟叫革拷锟斤拷锟侥点，锟斤拷锟斤拷锟斤拷纬锟绞斤拷锟矫伙拷锟斤拷锟斤拷魏锟斤拷锟斤拷甏︼拷锟斤拷锟斤拷巍锟斤拷锟饺伙拷锟斤拷锟绞撅拷锟斤拷隙锟斤拷锟斤拷锟斤拷锟轿诧拷锟斤拷锟斤拷锟斤拷锟解，锟斤拷锟斤拷锟节伙拷图锟斤拷锟较伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟较会讲锟斤拷锟斤拷锟铰ｏ拷锟接撅拷效锟斤拷锟酵诧拷太锟斤拷锟剿★拷

锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟叫的碉拷锟斤拷锟接筹拷锟斤拷时锟斤拷使锟斤拷Polyline锟斤拷式要锟津单得多。锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟轿筹拷式锟斤拷锟斤拷同锟侥撅拷锟轿ｏ拷

Polyline (hdc, apt, 5) ;

锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟角碉拷锟斤拷锟侥匡拷锟斤拷锟斤拷腔锟斤拷锟斤拷锟绞癸拷锟�(sizeof (apt) / sizeof (POINT))锟斤拷锟斤拷示锟斤拷锟街碉拷锟絇olyline锟斤拷一锟斤拷MoveToEx锟斤拷式锟斤拷锟斤拷蛹锟斤拷锟絃ineTo锟斤拷式锟斤拷效锟斤拷锟斤拷同锟斤拷锟斤拷锟角ｏ拷Polyline锟饺诧拷使锟斤拷也锟斤拷锟侥憋拷目前位锟矫★拷PolylineTo锟斤拷些锟斤拷同锟斤拷锟斤拷锟斤拷锟绞绞癸拷锟侥壳拔伙拷锟斤拷锟轿拷锟绞硷拷悖拷锟斤拷锟侥壳拔伙拷锟斤拷瓒ㄎ拷锟斤拷锟揭伙拷锟斤拷叩锟斤拷盏恪ｏ拷锟斤拷锟侥筹拷式锟诫画锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示一锟斤拷锟侥撅拷锟轿ｏ拷

MoveToEx (hdc, apt[0].x, apt[0].y, NULL) ;
PolylineTo (hdc, apt + 1, 4) ;

锟斤拷锟斤拷锟皆对硷拷锟斤拷锟斤拷使锟斤拷Polyline锟斤拷PolylineTo锟斤拷锟斤拷些锟斤拷式锟节伙拷锟狡革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟斤拷使锟斤拷锟缴硷拷锟斤拷锟斤拷锟斤拷锟斤拷千锟斤拷锟斤拷锟斤拷傻募锟斤拷锟斤拷叨危锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟界，锟斤拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥ｏ拷锟斤拷式5-2锟斤拷示锟斤拷SINEWAVE锟斤拷式锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷恪�

 锟斤拷式5-2  SINEWAVE
SINEWAVE.C
/*-------------------------------------------------------------------
   SINEWAVE.C -- Sine Wave Using Polyline
            (c) Charles Petzold, 1998
---------------------------------------------------------------------*/
#include <windows.h>
#include <math.h>

#define NUM	1000
#define TWOPI	(2 * 3.14159)
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (	HINSTANCE hInstance, HINSTANCE hPrevInstance,
			PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("SineWave") ;
	HWND 		hwnd ;
	MSG  		msg ;
	WNDCLASS 	wndclass ;
     
	wndclass.style		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra	= 0 ;
	wndclass.hInstance	= hInstance ;
	wndclass.hIcon 	= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName  = NULL ;
	wndclass.lpszClassName = szAppName ;
          
	if (!RegisterClass (&wndclass))
	{
		MessageBox (	NULL, TEXT ("Program requires Windows NT!"), 
			szAppName, MB_ICONERROR) ;
			return 0 ;
	}
     
	hwnd = CreateWindow (	szAppName, TEXT ("Sine Wave Using Polyline"),
 				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
     
	while (GetMessage (&msg, NULL, 0, 0))
     {
		TranslateMessage (&msg) ;
      		DispatchMessage (&msg) ;
	}
		return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static int  cxClient, cyClient ;
	HDC         hdc ;
	int         i ;
	PAINTSTRUCT ps ;
	POINT       apt [NUM] ;
     
	switch (message)
	{
	case 	WM_SIZE:
		cxClient = LOWORD (lParam) ;
		cyClient = HIWORD (lParam) ;
		return 0 ;
          
	case 	WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;
          
		MoveToEx (hdc, 0,		cyClient / 2, NULL) ;
		LineTo   (hdc, cxClient, cyClient / 2) ;
          
		for (i = 0 ; i < NUM ; i++)
          {
			apt[i].x = i * cxClient / NUM ;
			apt[i].y = (int) (cyClient / 2 * (1 - sin (TWOPI * i / NUM))) ;
          }
          
		Polyline (hdc, apt, NUM) ;
		return 0 ;
          
	case 	WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	  }
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

锟斤拷锟斤拷锟绞斤拷锟揭伙拷锟斤拷锟斤拷锟�1000锟斤拷POINT锟结构锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷for锟斤拷圈锟斤拷0锟斤拷锟接碉拷999锟斤拷锟结构锟斤拷x锟斤拷员锟借定为锟斤拷0锟斤拷锟斤拷锟斤拷锟斤拷值cxClient锟斤拷锟结构锟斤拷y锟斤拷员锟借定为一锟斤拷锟斤拷锟节碉拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷锟脚达拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭的伙拷锟狡斤拷锟斤拷使锟斤拷锟斤拷一锟斤拷Polyline锟斤拷锟叫★拷锟斤拷为Polyline锟斤拷式锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟绞碉拷锟斤拷模锟斤拷锟斤拷锟斤拷要锟饺猴拷锟斤拷1000锟斤拷LineTo锟斤拷枚啵拷锟斤拷锟斤拷图5-5锟斤拷示锟斤拷

锟斤拷

图5-5 SINEWAVE锟斤拷示

锟竭斤拷锟绞�
锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟桔碉拷锟斤拷Arc锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷圆锟斤拷锟竭★拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟紼llipse锟斤拷式锟斤拷锟斤拷么Arc锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟解；锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絉ectangle锟斤拷式锟斤拷锟斤拷么Ellipse锟斤拷式锟街斤拷锟斤拷锟斤拷锟斤拷锟解；锟斤拷锟斤拷锟斤拷锟斤拷锟紼llipse锟斤拷Rectangle锟斤拷式锟斤拷锟斤拷么锟斤拷锟街伙拷锟斤拷锟斤拷RoundRect锟斤拷Chord锟斤拷Pie锟斤拷式锟斤拷

锟斤拷锟斤拷锟斤拷於ｏ拷Rectangle锟斤拷Ellipse锟斤拷RoundRect锟斤拷Chord锟斤拷Pie锟斤拷式锟较革拷锟斤拷说锟斤拷锟角伙拷锟竭猴拷式锟斤拷没锟斤拷锟斤拷锟斤拷些锟斤拷式锟斤拷锟节伙拷锟竭ｏ拷锟斤拷锟斤拷锟斤拷同时锟斤拷锟斤拷锟诫画刷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷刷锟节讹拷为锟斤拷色锟斤拷锟斤拷说锟斤拷锟斤拷锟揭伙拷锟绞癸拷锟斤拷锟叫╋拷锟绞绞憋拷锟斤拷锟斤拷锟斤拷懿锟斤拷锟阶拷獾斤拷锟斤拷遣锟街伙拷腔锟斤拷摺锟斤拷细锟斤拷说锟斤拷锟斤拷些锟斤拷式锟斤拷锟斤拷锟斤拷妗革拷锟斤拷锟斤拷锟斤拷颉沟锟叫★拷冢锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷恰锟�

锟斤拷锟斤拷锟结到锟侥猴拷式锟斤拷一锟斤拷锟斤拷同锟斤拷锟皆ｏ拷锟斤拷锟斤拷锟角讹拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟轿边斤拷锟斤拷锟斤拷锟酵硷拷摹锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥框，硷拷锟斤拷锟竭斤拷锟�(bounding box)锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诨锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷些锟斤拷式锟斤拷锟斤拷虻サ木锟斤拷腔锟揭伙拷锟斤拷锟斤拷危锟�

Rectangle (hdc, xLeft, yTop, xRight, yBottom) ;

锟斤拷(xLeft, yTop)锟角撅拷锟轿碉拷锟斤拷锟较角ｏ拷(xRight, yBottom)锟角撅拷锟轿碉拷锟斤拷锟铰角★拷锟矫猴拷式Rectangle锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷图5-6锟斤拷示锟斤拷锟斤拷锟轿的憋拷锟斤拷锟斤拷平锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷水平锟酵达拷直锟竭★拷

锟斤拷

图5-6 使锟斤拷Rectangle锟斤拷式锟斤拷锟斤拷锟斤拷图锟斤拷

锟斤拷前写锟斤拷图锟轿筹拷式锟侥筹拷式写锟斤拷锟斤拷锟斤拷悉图锟斤拷偏锟斤拷锟斤拷锟斤拷狻ｏ拷锟叫┩硷拷锟较低筹拷锟斤拷锟斤拷锟酵硷拷伟锟斤拷锟斤拷锟斤拷锟斤拷锟酵碉拷锟斤拷锟疥，锟斤拷锟斤拷些锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷偷锟斤拷锟斤拷辍indows锟斤拷锟斤拷锟斤拷一锟街凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟街革拷锟津单的凤拷锟斤拷锟斤拷思锟斤拷锟斤拷锟斤拷锟斤拷狻�

锟斤拷锟斤拷锟斤拷锟斤拷暮锟绞斤拷锟斤拷校锟�

Rectangle (hdc, 1, 1, 5, 4) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟结到锟斤拷Windows锟节边斤拷锟斤拷诨锟酵硷拷锟斤拷锟斤拷越锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷每锟斤拷图锟截讹拷锟斤拷一锟斤拷锟斤拷锟斤拷元锟节★拷锟竭斤拷锟斤拷锟斤拷锟斤拷锟斤拷希锟饺伙拷锟斤拷诒呓锟斤拷锟节伙拷锟斤拷锟轿ｏ拷锟斤拷锟斤拷说锟斤拷锟斤拷图锟轿伙拷锟斤拷锟斤拷时锟斤拷锟斤拷锟接ｏ拷

锟斤拷

锟斤拷锟斤拷锟轿猴拷锟斤拷示锟斤拷锟斤拷锟斤拷锟较角分匡拷锟斤拷锟斤拷锟斤拷锟斤拷l锟斤拷图锟截匡拷锟斤拷

锟斤拷锟斤拷前锟结到锟斤拷锟斤拷Rectangle锟较革拷锟剿碉拷锟斤拷腔锟斤拷吆锟绞斤拷锟紾DI也锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷为锟节讹拷锟矫帮拷色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI锟斤拷锟斤拷锟斤拷锟津并诧拷锟斤拷锟皆★拷

锟斤拷知锟斤拷锟斤拷锟斤拷位锟斤拷锟斤拷危锟揭诧拷锟街拷锟斤拷锟斤拷锟轿伙拷锟斤拷圆锟斤拷锟斤拷为锟斤拷锟斤拷使锟矫的诧拷锟斤拷锟斤拷锟斤拷锟斤拷同锟侥ｏ拷

Ellipse (hdc, xLeft, yTop, xRight, yBottom) ;

锟斤拷Ellipse锟斤拷式锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷图5-7锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭癸拷锟缴的边斤拷颍锟�

锟斤拷

图5-7 锟斤拷Ellipse锟斤拷式锟斤拷锟斤拷锟斤拷图锟斤拷

锟斤拷圆锟角撅拷锟轿的猴拷式使锟斤拷锟诫函式Rectangle锟斤拷Ellipse锟斤拷式锟斤拷同锟侥边斤拷颍锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

RoundRect (	hdc, xLeft, yTop, xRight, yBottom,
    		xCornerEllipse, yCornerEllipse) ;

锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟酵硷拷锟斤拷锟�5-8锟斤拷示锟斤拷

锟斤拷

图5-8 锟斤拷RoundRect锟斤拷式锟斤拷锟斤拷锟斤拷图锟斤拷

Windows使锟斤拷一锟斤拷小锟斤拷圆锟斤拷锟斤拷圆锟角ｏ拷锟斤拷锟斤拷锟皆诧拷目锟轿獂CornerEllipse锟斤拷锟斤拷为yCornerEllipse锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫★拷锟皆诧拷锟轿拷锟斤拷母锟斤拷锟斤拷郑锟揭伙拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟矫匡拷锟斤拷蘸锟斤拷锟斤拷诰锟斤拷蔚锟揭伙拷锟斤拷锟斤拷稀锟� xCornerEllipse锟斤拷yCornerEllipse锟斤拷值越锟襟，角撅拷越锟斤拷锟皆★拷锟斤拷锟絰CornerEllipse锟斤拷锟絰Left锟斤拷xRight锟侥差，锟斤拷yCornerEllipse锟斤拷锟統Top锟斤拷yBottom锟侥差，锟斤拷么RoundRect锟斤拷式锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷圆锟斤拷

锟节伙拷锟斤拷图5-8锟斤拷示锟斤拷圆锟角撅拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷墓锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷圆锟侥尺寸。

xCornerEllipse = (xRight - xLeft) / 4 ;
yCornerEllipse = (yBottom- yTop) / 4 ;

锟斤拷锟斤拷一锟街简单的凤拷锟斤拷锟斤拷锟斤拷锟角斤拷锟斤拷锟斤拷锟斤拷锟斤拷械悴伙拷跃锟斤拷锟斤拷锟轿拷堑锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诰锟斤拷纬锟斤拷锟揭伙拷锟揭拷锟叫╋拷锟揭拷锟斤拷锟斤拷锟揭伙拷锟斤拷猓拷锟斤拷锟斤拷锟斤拷锟絰CornerEllipse锟斤拷yCornerEllipse锟斤拷值锟斤拷取锟�

Arc锟斤拷Chord锟斤拷Pie锟斤拷式锟斤拷只要锟斤拷同锟侥诧拷锟斤拷锟斤拷

Arc	(hdc, xLeft, yTop, xRight, yBottom, xStart, yStart, xEnd, yEnd) ;
Chord	(hdc, xLeft, yTop, xRight, yBottom, xStart, yStart, xEnd, yEnd) ;
Pie	(hdc, xLeft, yTop, xRight, yBottom, xStart, yStart, xEnd, yEnd) ;

锟斤拷Arc锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图5-9锟斤拷示锟斤拷锟斤拷Chord锟斤拷Pie锟斤拷式锟斤拷锟斤拷锟斤拷锟竭分憋拷锟斤拷图5-10锟斤拷5-11锟斤拷示锟斤拷Windows锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷呓锟�(xStart, yStart)锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷锟接ｏ拷锟接革拷锟斤拷锟斤拷呓锟斤拷慕锟斤拷憧硷拷锟� Windows锟斤拷锟斤拷时锟诫方锟斤拷锟斤拷锟斤拷锟斤拷圆锟斤拷一锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷呓锟�(xEnd锟斤拷yEnd)锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷锟接ｏ拷锟节革拷锟斤拷锟斤拷呓锟斤拷慕锟斤拷愦︼拷锟絎indows停止锟斤拷锟斤拷锟斤拷

锟斤拷

图5-9 Arc锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷

图5-10 Chord锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷

图5-11 Pie锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟紸rc锟斤拷式锟斤拷锟斤拷锟斤拷锟酵斤拷锟斤拷锟剿★拷锟斤拷为锟斤拷只锟斤拷一锟斤拷锟斤拷圆锟轿碉拷锟竭讹拷锟窖ｏ拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟津。讹拷锟紺hord锟斤拷式锟斤拷Windows锟斤拷锟接伙拷锟竭的端点。锟斤拷锟斤拷锟絇ie锟斤拷式锟斤拷Windows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷锟节诧拷锟斤拷目前锟斤拷刷锟斤拷锟诫。

锟斤拷锟斤拷锟杰诧拷太锟斤拷锟斤拷锟斤拷Arc锟斤拷Chord锟斤拷Pie锟斤拷式锟叫匡拷始锟酵斤拷锟斤拷位锟矫碉拷锟矫凤拷锟斤拷为什么锟斤拷锟津单碉拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷始锟酵斤拷锟斤拷锟斤拷锟截ｏ拷锟角的ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷么锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫诧拷锟斤拷锟斤拷锟叫╋拷恪indows锟侥凤拷锟斤拷锟节诧拷要锟斤拷锟斤拷锟街撅拷确锟皆碉拷锟斤拷锟斤拷锟铰ｏ拷却锟斤拷锟斤拷锟斤拷锟酵拷墓锟斤拷锟斤拷锟�

锟斤拷式5-3 LINEDEMO锟斤拷一锟斤拷锟斤拷锟轿★拷一锟斤拷锟斤拷圆锟斤拷一锟斤拷圆锟角撅拷锟轿猴拷锟斤拷锟斤拷锟竭段ｏ拷锟斤拷锟斤拷锟斤拷锟角帮拷锟斤拷一顺锟津。筹拷式锟斤拷锟斤拷锟剿讹拷锟斤拷锟斤拷锟斤拷锟斤拷暮锟绞绞碉拷锟斤拷隙锟斤拷锟叫╋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟诫，锟斤拷为锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷弑锟斤拷锟阶★拷耍锟斤拷锟斤拷锟斤拷图5-12锟斤拷锟斤拷示锟斤拷

 锟斤拷式5-3 LINEDEMO
LINEDEMO.C
/*---------------------------------------------------------
   LINEDEMO.C -- Line-Drawing Demonstration Program
            			 (c) Charles Petzold, 1998
----------------------------------------------------------*/

#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
             			  PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("LineDemo") ;
	HWND 		hwnd ;
	MSG  		msg ;
	WNDCLASS	wndclass ;
     
	wndclass.style		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra = 0 ;
	wndclass.hInstance	= hInstance ;
	wndclass.hIcon		= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;
     
	if (!RegisterClass (&wndclass))
	{
		MessageBox (NULL, TEXT ("Program requires Windows NT!"), 
                     szAppName, MB_ICONERROR) ;
		return 0 ;
	}
     
	hwnd = CreateWindow (	szAppName, TEXT ("Line Demonstration"),
                				WS_OVERLAPPEDWINDOW,
           				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
     
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
     
	while (GetMessage (&msg, NULL, 0, 0))
	{
		  TranslateMessage (&msg) ;
		  DispatchMessage (&msg) ;
     }
		return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static int  cxClient, cyClient ;
	HDC		hdc ;
	PAINTSTRUCT ps ;
     
	switch (message)
	{
	case	WM_SIZE:
		cxClient = LOWORD (lParam) ;
		cyClient = HIWORD (lParam) ;
		return 0 ;
          
	case	WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;
          
		Rectangle (hdc,     cxClient / 8,     cyClient / 8,
			   7 * cxClient / 8, 7 * cyClient / 8) ;
          
		MoveToEx  (hdc,        0,        0, NULL) ;
		LineTo    (hdc, cxClient, cyClient) ;
          
		MoveToEx  (hdc,        0, cyClient, NULL) ;
		LineTo    (hdc, cxClient,        0) ;
          
		Ellipse   (hdc,     cxClient / 8,     cyClient / 8,
			   7 * cxClient / 8, 7 * cyClient / 8) ;
          
		RoundRect (hdc,     cxClient / 4,     cyClient / 4,
			   3 * 	cxClient / 4, 3 * cyClient / 4,
				cxClient / 4,     cyClient / 4) ;
          
		EndPaint (hwnd, &ps) ;
		return 0 ;
          
	case 	WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

锟斤拷

图5-12 LINEDEMO锟斤拷示

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
锟斤拷

锟斤拷锟斤拷锟竭★拷锟斤拷锟斤拷蚀锟角爸革拷锟斤拷锟揭黄就凤拷锟斤拷锟狡わ拷锟斤拷呓锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街斤拷匣锟斤拷锟斤拷摺锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷锟斤拷一些锟斤拷同图锟姐，锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷之锟戒画一锟斤拷锟斤拷锟竭ｏ拷锟节诧拷锟斤拷锟斤拷锟藉）锟斤拷锟斤拷锟斤拷锟饺斤拷锟斤拷些锟斤拷锟斤拷锟节伙拷图纸锟较ｏ拷然锟结，锟斤拷锟斤拷锟竭讹拷锟斤拷锟斤拷些锟斤拷锟较ｏ拷锟斤拷锟斤拷铅锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟侥凤拷锟斤拷锟斤拷锟竭★拷

锟斤拷然锟斤拷时锟斤拷锟斤拷锟秸ｏ拷锟斤拷锟斤拷锟窖撅拷锟斤拷学锟斤拷式锟斤拷锟剿★拷锟叫很讹拷锟街诧拷同锟斤拷锟斤拷锟竭癸拷式锟斤拷锟斤拷锟角革拷锟斤拷千锟斤。锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角碉拷锟皆筹拷式锟斤拷锟斤拷锟斤拷玫锟斤拷锟斤拷锟斤拷锟斤拷吖锟绞街伙拷锟斤拷锟斤拷锟街憋拷锟斤拷锟斤拷锟脚加碉拷锟斤拷业系统锟斤拷蔚锟酵硷拷锟街г拷械摹锟斤拷锟斤拷锟绞拷锟斤拷Renault锟斤拷锟斤拷锟斤拷司锟斤拷锟斤拷锟斤拷锟斤拷锟街癸拷锟斤拷瞥锟斤拷澹ㄒ拷玫锟秸筹拷锟斤拷锟斤拷锟斤拷锟斤拷愿锟斤拷锟斤拷锟狡碉拷转锟戒。锟斤拷锟斤拷锟斤拷要一些锟斤拷学锟斤拷锟竭ｏ拷锟斤拷Pierm Bezier锟揭碉拷锟斤拷一锟阶癸拷式锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟阶癸拷式应锟斤拷锟斤拷锟斤拷锟侥癸拷锟斤拷锟角筹拷锟斤拷锟矫★拷

锟斤拷锟结，锟斤拷维锟侥憋拷锟斤拷锟斤拷锟斤拷锟竭筹拷锟剿碉拷锟斤拷图学锟斤拷锟斤拷锟斤拷锟矫碉拷锟斤拷锟竭ｏ拷锟斤拷直锟竭猴拷锟斤拷圆之锟结）锟斤拷锟斤拷PostScript锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟竭讹拷锟矫憋拷锟斤拷锟斤拷锟斤拷锟竭憋拷示锟斤拷锟斤拷圆锟斤拷锟矫憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟狡斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷於讹拷锟斤拷PostScript锟斤拷锟斤拷锟斤拷锟皆拷锟斤拷锟斤拷锟絋rueType使锟斤拷一锟街革拷锟津单革拷锟斤拷锟劫碉拷锟斤拷锟竭癸拷式锟斤拷锟斤拷

一锟斤拷锟斤拷维锟侥憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥革拷锟姐定锟藉－锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷锟斤拷频恪ｏ拷锟斤拷叩亩说锟斤拷锟斤拷锟斤拷锟斤拷说锟斤拷希锟斤拷锟斤拷频锟酵猴拷锟今「达拷石锟斤拷一锟斤拷锟斤拷锟斤拷锟竭达拷锟斤拷锟斤拷锟剿碉拷锟斤拷直锟竭达拷锟斤拷锟竭★拷锟斤拷一锟斤拷锟斤拷锟斤拷傻锟斤拷碌锟紹EZIER锟斤拷锟斤拷锟斤拷谈锟斤拷式锟斤拷锟斤拷锟斤拷玫锟秸故撅拷锟斤拷锟斤拷式5-4锟斤拷示锟斤拷

 锟斤拷式5-4  BEZIER
BEZIER.C
/*-----------------------------------------------------------------------
	BEZIER.C -- Bezier Splines Demo
           			(c) Charles Petzold, 1998
------------------------------------------------------------------------*/

#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (	HINSTANCE hInstance, HINSTANCE hPrevInstance,
      			PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("Bezier") ;
	HWND		hwnd ;
	MSG 		msg ;
	WNDCLASS	wndclass ;

	wndclass.style 		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra	= 0 ;
	wndclass.hInstance 	= hInstance ;
	wndclass.hIcon 		= LoadIcon (NULL, IDI_APPLICATION) ;
 	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;
     
	if (!RegisterClass (&wndclass))
	{
		MessageBox (NULL, TEXT ("Program requires Windows NT!"), 
             			   szAppName, MB_ICONERROR) ;
      		return 0 ;
	}
     
	hwnd = CreateWindow (	szAppName, TEXT ("Bezier Splines"),
                				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
     
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
     
	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	return msg.wParam ;
}

void DrawBezier (HDC hdc, POINT apt[])
{
	PolyBezier (hdc, apt, 4) ;
	MoveToEx (hdc, apt[0].x, apt[0].y, NULL) ;
	LineTo   (hdc, apt[1].x, apt[1].y) ;
     
	MoveToEx (hdc, apt[2].x, apt[2].y, NULL) ;
	LineTo   (hdc, apt[3].x, apt[3].y) ;
}
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static POINT apt[4] ;
	HDC          hdc ;
	int          cxClient, cyClient ;
	PAINTSTRUCT  ps ;

	switch (message)
	{
	case WM_SIZE:
		cxClient = LOWORD (lParam) ;
		cyClient = HIWORD (lParam) ;
          
			apt[0].x = cxClient / 4 ;
			apt[0].y = cyClient / 2 ;
          
			apt[1].x = cxClient / 2 ;
			apt[1].y = cyClient / 4 ;
          
			apt[2].x = cxClient / 2 ;
			apt[2].y = 3 * cyClient / 4 ;
          
			apt[3].x = 3 * cxClient / 4 ;
			apt[3].y = cyClient / 2 ;
          
			return 0 ;

	case WM_LBUTTONDOWN:
	case WM_RBUTTONDOWN:
	case WM_MOUSEMOVE:
		if (wParam & MK_LBUTTON || wParam & MK_RBUTTON)
		{
			hdc = GetDC (hwnd) ;
			SelectObject (hdc, GetStockObject (WHITE_PEN)) ;
			DrawBezier (hdc, apt) ;
               
			if (wParam & MK_LBUTTON)
			{
				apt[1].x = LOWORD (lParam) ;
				apt[1].y = HIWORD (lParam) ;
			}
               
               if (wParam & MK_RBUTTON)
			{
					apt[2].x = LOWORD (lParam) ;
					apt[2].y = HIWORD (lParam) ;
			}
               
			SelectObject (hdc, GetStockObject (BLACK_PEN)) ;
			DrawBezier (hdc, apt) ;
			ReleaseDC (hwnd, hdc) ;
		}
			return 0 ;
	case 	WM_PAINT:
		InvalidateRect (hwnd, NULL, TRUE) ;
          
		hdc = BeginPaint (hwnd, &ps) ;
          
		DrawBezier (hdc, apt) ;
          
		EndPaint (hwnd, &ps) ;
		return 0 ;
          
	case WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

锟斤拷锟斤拷锟斤拷锟斤拷式要锟矫碉拷一些锟节碉拷锟斤拷锟铰才斤拷锟侥伙拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷也锟角简单的ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟绞碉拷锟斤拷缘夭锟斤拷荼锟斤拷锟斤拷锟斤拷锟斤拷摺锟斤拷锟斤拷锟斤拷锟斤拷式锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟借定锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷戮锟斤拷小锟斤拷锟斤拷锟轿伙拷1/4锟斤拷3/4锟斤拷锟斤拷位锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟狡碉拷锟斤拷愿谋洌拷锟阶★拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭硷拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷苑直锟侥讹拷锟斤拷锟斤拷锟斤拷锟狡碉拷之一锟斤拷图5-13锟斤拷一锟斤拷锟斤拷锟酵碉拷锟斤拷锟接★拷

锟斤拷锟剿憋拷锟斤拷锟斤拷锟斤拷锟竭憋拷锟斤拷锟斤拷锟斤拷式锟斤拷锟接碉拷一锟斤拷锟斤拷锟狡碉拷锟斤拷锟斤拷叩牡锟揭伙拷锟斤拷说悖ㄒ诧拷锟斤拷锟斤拷锟绞硷拷悖╋拷锟揭伙拷锟街憋拷撸锟斤拷锟斤拷拥诙锟斤拷锟斤拷锟斤拷频锟斤拷锟斤拷冶叩亩说慊伙拷锟街憋拷摺锟�

锟斤拷锟斤拷锟斤拷婕革拷锟斤拷氐悖拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诘锟斤拷愿锟斤拷锟斤拷锟斤拷锟叫非筹拷锟斤拷锟矫★拷锟斤拷锟饺ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷习锟斤拷锟酵匡拷锟皆帮拷锟斤拷锟竭碉拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷状锟角筹拷锟接斤拷锟斤拷

锟斤拷

图5-13 BEZIER锟斤拷式锟斤拷锟斤拷示

锟斤拷危锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷叻浅锟斤拷每锟斤拷啤锟斤拷锟斤拷锟叫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷说锟斤拷锟斤拷锟竭诧拷锟斤拷锟斤拷锟轿猴拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷叩牡恪ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷说憧硷拷徒锟斤拷锟斤拷模锟斤拷锟斤拷锟斤拷锟斤拷频锟斤拷锟斤拷锟斤拷锟斤拷锟绞绞憋拷锟斤拷锟斤拷募锟斤拷锟街伙拷锟斤拷锟斤拷锟斤拷猓拷锟叫╋拷锟绞斤拷锟斤拷锟斤拷吖锟绞斤拷锟斤拷锟斤拷锟姐，锟斤拷锟斤拷些锟姐处锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷远锟斤拷锟斤拷锟节碉拷锟皆革拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷呛懿锟斤拷锟斤拷实摹锟斤拷锟绞碉拷希锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟侥憋拷锟轿ｏ拷锟斤拷锟斤拷锟斤拷凸锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谋锟斤拷锟斤拷啥说锟酵匡拷锟狡碉拷锟斤拷锟接讹拷锟缴★拷

锟斤拷锟斤拷锟斤拷锟截碉拷锟芥及锟剿碉拷涂锟斤拷频锟街拷锟侥癸拷系锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷频愕斤拷锟斤拷锟街憋拷锟斤拷锟斤拷校锟斤拷锟斤拷锟斤拷锟酵伙拷锟斤拷锟酵憋拷锟揭诧拷锟节讹拷锟斤拷锟斤拷锟狡点到锟秸碉拷锟街憋拷锟斤拷锟斤拷校锟斤拷锟斤拷锟斤拷锟酵伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟狡碉拷锟斤拷锟斤拷锟斤拷锟斤拷式时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟借。

锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷锟饺较撅拷锟斤拷锟斤拷锟叫★拷锟斤拷知锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟桔碉拷锟斤拷锟解，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷只锟斤拷锟揭诧拷锟斤拷锟斤拷锟诫。

锟斤拷32位元锟斤拷Windows锟芥本之前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Polyline锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭ｏ拷锟斤拷锟揭伙拷锟斤拷要知锟斤拷锟斤拷锟斤拷谋锟斤拷锟斤拷锟斤拷锟斤拷叩牟锟斤拷锟斤拷锟斤拷獭锟斤拷锟斤拷锟斤拷( x0,y0)锟斤拷锟秸碉拷锟斤拷( x3,y3)锟斤拷锟斤拷锟斤拷锟斤拷锟狡碉拷锟斤拷(x1,y1)锟斤拷(x2,y2)锟斤拷锟斤拷锟斤拷t锟斤拷值锟斤拷0锟斤拷1锟侥变化锟斤拷锟酵匡拷锟皆伙拷锟斤拷锟斤拷锟竭ｏ拷

x(t) = (1 - t)3 x0 + 3t (1 - t)2 x1 + 3t2 (1 - t) x2 + t3 x3
y(t) = (1 - t)3 y0 + 3t (1 - t)2 y1 + 3t2 (1 - t) y2 + t3 y3

锟斤拷Windows 98锟叫ｏ拷锟斤拷锟斤拷锟斤拷要知锟斤拷锟斤拷些锟斤拷式锟斤拷要锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拥谋锟斤拷锟斤拷锟斤拷锟斤拷撸锟街伙拷锟斤拷锟叫ｏ拷

PolyBezier (hdc, apt, iCount) ;

锟斤拷

PolyBezierTo (hdc, apt, iCount) ;

锟斤拷锟斤拷锟斤拷锟斤拷拢锟絘pt锟斤拷锟斤拷POINT锟结构锟斤拷锟斤拷锟叫★拷锟斤拷PolyBezier锟斤拷前锟侥革拷锟姐（锟斤拷锟斤拷顺锟津）革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭碉拷锟斤拷恪拷锟揭伙拷锟斤拷锟斤拷频恪拷诙锟斤拷锟斤拷锟斤拷频锟斤拷锟秸点。锟斤拷锟斤拷锟矫恳伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟姐，锟斤拷为锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭碉拷锟斤拷锟斤拷锟斤拷前一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭碉拷锟秸点，锟斤拷锟斤拷锟斤拷啤锟絠Count锟斤拷锟斤拷锟斤拷锟�1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟狡碉拷锟斤拷些锟斤拷尾锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

PolyBezierTo锟斤拷式使锟斤拷目前锟斤拷锟斤拷为锟斤拷一锟斤拷锟斤拷悖拷锟揭伙拷锟斤拷约锟斤拷锟斤拷锟斤拷谋锟斤拷锟斤拷锟斤拷锟斤拷叨锟街伙拷锟揭拷锟斤拷锟斤拷锟斤拷锟斤拷恪ｏ拷锟斤拷锟绞斤拷锟斤拷锟绞憋拷锟侥壳帮拷锟斤拷瓒ㄎ拷锟斤拷锟揭伙拷锟斤拷盏恪�

一锟斤拷锟斤拷示锟斤拷锟节伙拷一系锟斤拷锟斤拷锟斤拷锟侥憋拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷只锟叫碉拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭的第讹拷锟斤拷锟斤拷锟狡点、锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭碉拷锟秸点（也锟斤拷锟角第讹拷锟斤拷锟斤拷锟竭碉拷锟斤拷悖╋拷偷诙锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷叩牡锟揭伙拷锟斤拷锟斤拷频锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷也锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷同一锟斤拷直锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接点处锟斤拷锟角光滑锟侥★拷

使锟斤拷锟斤拷锟叫伙拷锟绞ｏ拷Stock Pens锟斤拷
锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟桔碉拷锟轿何伙拷锟竭猴拷式时锟斤拷Windows使锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷目前选锟叫的★拷锟斤拷锟绞★拷锟斤拷锟斤拷锟竭★拷锟斤拷锟绞撅拷锟斤拷锟竭碉拷色锟绞★拷锟斤拷锟饺和伙拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷实锟竭★拷锟姐划锟竭伙拷锟斤拷锟斤拷锟竭ｏ拷锟节讹拷装锟斤拷锟斤拷锟斤拷锟叫伙拷锟斤拷为BLACK_PEN锟斤拷锟斤拷锟斤拷映锟戒方式锟斤拷什么锟斤拷锟斤拷锟街伙拷锟绞讹拷锟斤拷锟斤拷一锟斤拷图锟截匡拷锟侥猴拷色实锟斤拷锟斤拷锟斤拷BLACK_PEN锟斤拷Windows锟结供锟斤拷锟斤拷锟斤拷锟斤拷锟叫伙拷锟斤拷之一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷WHITE_PEN锟斤拷NULL_PEN锟斤拷NULL_PEN什么锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷锟皆硷拷锟皆讹拷锟斤拷锟绞★拷

Windows锟斤拷式锟皆达拷锟斤拷锟斤拷使锟矫伙拷锟绞★拷 Windows锟斤拷头锟斤拷锟斤拷WINDEF.H锟叫帮拷锟斤拷一锟斤拷锟斤拷锟斤拷HPEN锟斤拷锟斤拷态锟斤拷锟藉，锟斤拷锟斤拷锟绞的达拷锟脚ｏ拷锟斤拷锟皆讹拷锟斤拷锟斤拷锟斤拷锟教拷谋锟斤拷锟斤拷锟斤拷锟斤拷锟絟Pen锟斤拷锟斤拷

HPEN hPen ;

锟斤拷锟斤拷GetStockObject锟斤拷锟斤拷锟皆伙拷锟斤拷锟斤拷谢锟斤拷实拇锟斤拷拧锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟轿猈HITE_PEN锟斤拷锟斤拷锟叫伙拷锟绞ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷取锟矫伙拷锟绞的达拷锟脚ｏ拷

hPen = GetStockObject (WHITE_PEN) ;

锟斤拷锟节憋拷锟诫将锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷

SelectObject (hdc, hPen) ;

目前锟侥伙拷锟斤拷锟角帮拷色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷幔拷锟斤拷锟斤拷锟斤拷呓锟绞癸拷锟絎HITE_PEN锟斤拷直锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷伙拷锟斤拷锟酵凤拷装锟斤拷锟斤拷锟捷达拷锟斤拷为止锟斤拷

锟斤拷也锟斤拷锟皆诧拷锟斤拷锟斤拷hPen锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GetStockObject锟斤拷SelectObject锟斤拷锟叫合诧拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷

SelectObject (hdc, GetStockObject (WHITE_PEN)) ;

锟斤拷锟斤拷锟街革拷锟斤拷使锟斤拷BLACK_PEN锟斤拷状态锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷锟街伙拷锟绞的达拷锟脚ｏ拷锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷

SelectObject (hdc, GetStockObject (BLACK_PEN)) ;

SelectObject锟侥达拷锟斤拷值锟角此猴拷锟斤拷前装锟斤拷锟斤拷锟斤拷锟叫的伙拷锟绞达拷锟脚★拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷碌锟阶帮拷锟斤拷锟斤拷莶锟斤拷锟斤拷锟�

hPen = SelectObject (hdc, GetStockobject (WHITE_PEN)) ;

锟斤拷装锟斤拷锟斤拷锟斤拷锟叫碉拷目前锟斤拷锟绞斤拷为WHITE_PEN锟斤拷锟斤拷锟斤拷hPen锟斤拷锟斤拷锟斤拷BLACK_PEN锟侥达拷锟脚★拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷

SelectObject (hdc, hPen) ;

锟斤拷锟杰癸拷锟斤拷BLACK_PEN选锟斤拷装锟斤拷锟斤拷锟捷★拷

锟斤拷锟绞的斤拷锟斤拷锟斤拷选锟斤拷锟缴撅拷锟�
锟斤拷

锟斤拷锟斤拷使锟斤拷锟斤拷锟叫伙拷锟绞非筹拷锟斤拷锟姐，锟斤拷却锟斤拷锟斤拷锟绞碉拷牡暮诨锟斤拷省锟绞碉拷牡陌谆锟斤拷驶锟斤拷锟矫伙拷谢锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫碉拷锟斤拷锟结富锟斤拷实锟叫э拷锟斤拷锟斤拷捅锟斤拷虢拷锟斤拷约锟斤拷幕锟斤拷省锟�

锟斤拷一锟斤拷锟斤拷通锟斤拷锟角ｏ拷使锟矫猴拷式CreatePen锟斤拷CreatePenIndirect锟斤拷锟斤拷一锟斤拷锟斤拷锟竭硷拷锟斤拷锟绞★拷锟斤拷锟斤拷锟斤拷锟斤拷嵌曰锟斤拷实锟斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟绞斤拷锟斤拷锟斤拷呒锟斤拷锟斤拷实拇锟斤拷牛锟饺伙拷幔拷锟斤拷锟絊electObject锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷★拷锟斤拷锟节ｏ拷锟酵匡拷锟斤拷使锟斤拷锟铰的伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟斤拷锟轿猴拷时锟津，讹拷只锟斤拷锟斤拷一锟街伙拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷★拷锟斤拷锟酵凤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟斤拷锟斤拷选锟斤拷锟斤拷锟斤拷一锟街伙拷锟绞碉拷装锟斤拷锟斤拷锟斤拷锟叫ｏ拷之锟结，锟酵匡拷锟皆猴拷锟斤拷DeleteObject锟斤拷删锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟斤拷锟斤拷锟剿★拷锟斤拷删锟斤拷锟结，锟矫伙拷锟绞的达拷锟脚就诧拷锟斤拷锟斤拷效锟剿★拷

锟竭硷拷锟斤拷锟斤拷锟斤拷一锟街★拷GDI锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷越锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI锟斤拷锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷腔锟剿拷锟斤拷锟斤拷锟酵硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵碉拷色锟教★拷锟斤拷锟剿碉拷色锟斤拷之锟解，锟斤拷些锟斤拷锟斤拷锟斤拷锟酵拷锟絊electObject选锟斤拷装锟斤拷锟斤拷锟捷的★拷

锟斤拷使锟矫伙拷锟绞碉拷GDI锟斤拷锟绞憋拷锟接︼拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷要删锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GDI锟斤拷锟斤拷锟�
锟斤拷
锟斤拷GDI锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟叫э拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟绞憋拷锟斤拷锟揭撅拷锟斤拷锟斤拷锟�
锟斤拷
锟斤拷要删锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�
锟斤拷

锟斤拷些锟斤拷锟斤拷然锟斤拷锟叫碉拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟酵ξ拷锟侥★拷锟斤拷锟斤拷锟斤拷锟角斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷

CreatePen锟斤拷式锟斤拷锟斤法锟斤拷锟界：

hPen = CreatePen (iPenStyle, iWidth, crColor) ;

锟斤拷锟叫ｏ拷iPenStyle锟斤拷锟斤拷确锟斤拷锟斤拷锟斤拷锟斤拷实锟竭★拷锟斤拷锟竭伙拷锟斤拷锟斤拷锟竭ｏ拷锟矫诧拷锟斤拷锟斤拷锟斤拷锟斤拷WINGDI.H锟斤拷头锟斤拷锟斤拷锟叫讹拷锟斤拷锟斤拷锟斤拷锟绞讹拷锟斤拷郑锟酵�5-14锟斤拷示锟斤拷每锟街伙拷锟绞诧拷锟斤拷锟侥伙拷锟斤拷锟斤拷式锟斤拷

锟斤拷

图5-14 锟斤拷锟街伙拷锟斤拷锟斤拷式

锟斤拷锟絇S_SOLID锟斤拷PS_NULL锟斤拷PS_INSIDEFRAME锟斤拷锟斤拷锟斤拷式锟斤拷iWidth锟斤拷锟斤拷锟角伙拷锟绞的匡拷锟饺★拷iWidth值为0锟斤拷锟斤拷味锟斤拷锟斤拷锟绞匡拷锟斤拷为一锟斤拷图锟截★拷锟斤拷锟叫伙拷锟斤拷锟斤拷一锟斤拷图锟截匡拷锟斤拷锟斤拷锟街革拷锟斤拷锟斤拷堑慊拷呋锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟绞斤拷锟酵憋拷锟街革拷锟揭伙拷锟斤拷锟斤拷1锟斤拷实锟绞匡拷锟饺ｏ拷锟斤拷么Windows锟斤拷使锟斤拷实锟竭伙拷锟斤拷锟斤拷锟斤拷锟芥。

CreatePen锟斤拷crColor锟斤拷锟斤拷锟斤拷一锟斤拷COLORREF值锟斤拷锟斤拷指锟斤拷锟斤拷锟绞碉拷锟斤拷色锟斤拷锟斤拷於筹拷锟斤拷PS_INSIDEFRAME之锟斤拷幕锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟斤拷锟叫ｏ拷Windows锟结将锟斤拷色转锟斤拷为锟借备锟斤拷锟杰憋拷示锟斤拷锟斤拷锟斤拷锟斤拷拇锟缴拷锟絇S_INSIDEFRAME锟斤拷唯一一锟街匡拷锟斤拷使锟矫伙拷色锟侥伙拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷只锟斤拷锟节匡拷锟饺达拷锟�1锟斤拷锟斤拷锟斤拷虏锟斤拷锟剿★拷

锟斤拷锟诫定锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷暮锟绞揭伙拷锟绞癸拷锟绞憋拷锟絇S_INSIDEFRAME锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷锟斤拷於筹拷锟斤拷PS_INSIDEFRAME锟斤拷锟斤拷锟斤拷锟斤拷谢锟斤拷锟斤拷锟绞斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭斤拷锟侥伙拷锟绞匡拷锟饺达拷锟�1锟斤拷图锟截ｏ拷锟斤拷么锟斤拷锟绞斤拷锟斤拷锟叫讹拷锟斤拷锟节边斤拷锟斤拷锟斤拷希锟斤拷锟斤拷锟斤拷呓锟斤拷锟竭碉拷一锟斤拷锟街斤拷位於边斤拷锟街拷猓伙拷锟斤拷锟斤拷PS_INSIDEFRAME锟斤拷锟斤拷锟斤拷式锟斤拷说锟斤拷锟斤拷锟斤拷锟竭斤拷锟斤拷叨锟斤拷锟斤拷诒呓锟斤拷之锟节★拷

锟斤拷也锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷态为LOGPEN锟斤拷锟斤拷锟竭硷拷锟斤拷锟绞★拷锟斤拷锟侥结构锟斤拷锟斤拷锟斤拷锟斤拷CreatePenIndirect锟斤拷锟斤拷锟斤拷锟斤拷锟绞★拷锟斤拷锟斤拷锟斤拷某锟绞绞癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷谐锟绞硷拷锟斤拷幕锟斤拷剩锟斤拷锟矫词癸拷锟斤拷锟斤拷址锟斤拷锟斤拷锟斤拷锟叫э拷枚唷�

要使锟斤拷CreatePenIndirect锟斤拷锟斤拷锟饺讹拷锟斤拷一锟斤拷LOGPEN锟斤拷态锟侥结构锟斤拷

LOGPEN logpen ;

锟剿结构锟斤拷锟斤拷锟斤拷锟斤拷员锟斤拷lopnStyle锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷UINT锟斤拷锟角伙拷锟斤拷锟斤拷式锟斤拷lopnWidth锟斤拷POINT锟结构锟斤拷锟角帮拷锟竭硷拷锟斤拷位锟斤拷锟斤拷锟侥伙拷锟绞匡拷锟饺ｏ拷lopnColor (COLORREF)锟角伙拷锟斤拷锟斤拷色锟斤拷Windows只使锟斤拷lopnWidth锟结构锟斤拷x值锟斤拷为锟斤拷锟绞匡拷锟饺ｏ拷锟斤拷锟斤拷锟斤拷y值锟斤拷

锟斤拷锟结构锟斤拷位址锟斤拷锟捷革拷CreatePenIndirect锟结构锟酵匡拷锟皆斤拷锟斤拷锟斤拷锟斤拷锟剿ｏ拷

hPen = CreatePenIndirect (&logpen) ;

注锟解，CreatePen锟斤拷CreatePenIndirect锟斤拷式锟斤拷锟斤拷要装锟斤拷锟斤拷锟捷达拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷式锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷没锟斤拷锟斤拷系锟斤拷锟竭硷拷锟斤拷锟绞★拷直锟斤拷锟斤拷锟斤拷SelectObject之锟结，锟斤拷锟绞诧拷锟斤拷装锟斤拷锟斤拷锟捷凤拷锟斤拷锟斤拷系锟斤拷锟斤拷耍锟斤拷锟斤拷远圆锟酵拷锟斤拷璞革拷锟斤拷锟接┠伙拷锟接★拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟酵拷锟斤拷呒锟斤拷锟斤拷省锟�

锟斤拷锟斤拷锟角斤拷锟斤拷锟斤拷选锟斤拷锟缴撅拷锟斤拷锟斤拷实锟揭伙拷址锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷某锟绞绞癸拷锟斤拷锟斤拷只锟斤拷剩锟揭伙拷挚锟斤拷锟轿�1锟侥黑伙拷锟绞★拷一锟街匡拷锟斤拷为3锟侥红画锟绞猴拷一锟街猴拷色锟斤拷式锟斤拷锟绞ｏ拷锟斤拷锟斤拷锟斤拷锟饺讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟斤拷实拇锟斤拷牛锟�

static HPEN hPen1, hPen2, hPen3 ;

锟节达拷锟斤拷WM_CREATE锟节间，锟斤拷锟斤拷锟皆斤拷锟斤拷锟斤拷锟斤拷锟街伙拷锟绞ｏ拷

hPen1 = CreatePen (PS_SOLID, 1, 0) ;
hPen2 = CreatePen (PS_SOLID, 3, RGB (255, 0, 0)) ;
hPen3 = CreatePen (PS_DOT, 0, 0) ;

锟节达拷锟斤拷WM_PAINT锟节间，锟斤拷锟斤拷锟斤拷锟斤拷拥锟斤拷一锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷锟脚碉拷锟轿猴拷时锟斤拷锟斤，锟斤拷锟斤拷锟斤拷锟皆斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之一选锟斤拷装锟斤拷锟斤拷锟捷诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭ｏ拷

SelectObject (hdc, hPen2) ;

锟斤拷锟竭猴拷式

SelectObject (hdc, hPen1) ;

锟斤拷锟斤拷锟斤拷锟竭猴拷式

锟节达拷锟斤拷WM_DESTROY锟节间，锟斤拷锟斤拷锟斤拷删锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街伙拷锟绞ｏ拷

DeleteObject (hPen1) ;
DeleteObject (hPen2) ;
DeleteObject (hPen3) ;

锟斤拷锟角斤拷锟斤拷锟斤拷选锟斤拷锟缴撅拷锟斤拷锟斤拷锟斤拷锟街憋拷拥姆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷锟斤拷锟街拷锟街达拷锟斤拷诩锟斤拷锟揭拷锟叫╋拷呒锟斤拷锟斤拷剩锟轿拷耍锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟矫匡拷锟絎M_PAINT讯息锟斤拷锟斤拷锟节间建锟斤拷锟斤拷锟绞ｏ拷锟斤拷锟节猴拷锟斤拷EndPaint之锟斤拷删锟斤拷锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷锟节猴拷锟斤拷EndPaint之前删锟斤拷锟斤拷锟角ｏ拷锟斤拷锟斤拷要小锟侥ｏ拷锟斤拷要删锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷目前选锟斤拷幕锟斤拷剩锟斤拷锟�

锟斤拷锟斤拷锟杰伙拷希锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟绞ｏ拷锟斤拷锟斤拷CreatePen锟斤拷SelectObject锟斤拷锟斤拷锟斤拷系锟酵伙拷锟斤拷锟斤拷锟斤拷校锟�

SelectObject (hdc, CreatePen (PS_DASH, 0, RGB (255, 0, 0))) ;

锟斤拷锟斤拷锟劫匡拷始锟斤拷锟竭ｏ拷锟斤拷锟斤拷使锟斤拷一锟斤拷锟斤拷色锟斤拷锟竭伙拷锟绞★拷锟节伙拷锟斤拷锟缴拷锟斤拷锟街拷幔拷锟斤拷锟缴撅拷锟斤拷锟斤拷省锟斤拷锟斤拷耍锟斤拷锟斤拷没锟叫憋拷锟芥画锟绞达拷锟脚ｏ拷锟斤拷么锟斤拷锟斤拷删锟斤拷锟斤拷些锟斤拷锟斤拷锟截ｏ拷锟斤拷要锟斤拷锟斤拷锟斤拷锟阶★拷锟絊electObject锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷选锟斤拷幕锟斤拷蚀锟斤拷拧锟斤拷锟斤拷裕锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟絊electObject锟斤拷BLACK_PEN选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷删锟斤拷锟斤拷SelectObject锟斤拷锟截碉拷值锟斤拷

DeleteObject (SelectObject (hdc, GetStockObject (BLACK_PEN))) ;

锟斤拷锟斤拷锟斤拷锟斤拷一锟街凤拷锟斤拷锟斤拷锟节斤拷锟铰斤拷锟斤拷锟侥伙拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷SelectObject锟斤拷锟截的伙拷锟绞达拷锟脚ｏ拷

hPen = SelectObject (hdc, CreatePen (PS_DASH, 0, RGB (255, 0, 0))) ;

锟斤拷锟斤拷hPen锟斤拷什么锟截ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺★拷锟阶帮拷锟斤拷锟斤拷锟街拷锟斤拷一锟轿猴拷锟斤拷SelectObject锟斤拷锟斤拷hPen锟斤拷BLACK_PEN锟斤拷锟斤拷拇锟斤拷拧锟斤拷锟斤拷冢锟斤拷锟斤拷越锟絟Pen选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷删锟斤拷锟斤拷锟斤拷锟斤拷锟侥伙拷锟绞ｏ拷锟节讹拷锟斤拷SelectObject锟斤拷锟叫达拷锟截的达拷锟脚ｏ拷锟斤拷只要一锟斤拷锟斤拷锟斤拷锟斤拷锟缴ｏ拷

DeleteObject (SelectObject (hdc, hPen)) ;

锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷实拇锟斤拷牛锟斤拷涂锟斤拷锟酵拷锟斤拷锟斤拷锟紾etObject取锟斤拷LOGPEN锟结构锟斤拷锟斤拷锟斤拷员锟斤拷值锟斤拷

GetObject (hPen, sizeof (LOGPEN), (LPVOID) &logpen) ;

锟斤拷锟斤拷锟揭壳把★拷锟阶帮拷锟斤拷锟斤拷莸幕锟斤拷蚀锟斤拷牛锟斤拷锟斤拷院锟斤拷校锟�

hPen = GetCurrentObject (hdc, OBJ_PEN) ;

锟节碉拷十锟斤拷锟铰斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟绞的猴拷式ExtCreatePen锟斤拷

锟斤拷锟斤拷锟较�
锟斤拷

使锟矫碉拷式锟斤拷锟绞猴拷锟斤拷锟竭伙拷锟绞伙拷锟斤拷锟揭伙拷锟斤拷锟饺わ拷锟斤拷锟斤拷猓猴拷锟斤拷锟斤拷锟斤拷之锟斤拷目锟较讹拷锟斤拷锟斤拷锟斤拷兀锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟绞裁达拷锟�

锟斤拷隙锟斤拷锟斤拷色取锟斤拷锟阶帮拷锟斤拷锟斤拷莸锟斤拷锟斤拷锟斤拷锟斤拷裕锟斤拷锟斤拷锟侥Ｊ斤拷捅锟斤拷锟斤拷锟缴拷锟斤拷诙锟斤拷锟斤拷锟侥Ｊ轿狾PAQUE锟斤拷锟斤拷锟斤拷锟街凤拷式锟铰ｏ拷Windows使锟矫憋拷锟斤拷色锟斤拷锟斤拷锟斤拷锟较讹拷锟斤拷诙锟斤拷谋锟斤拷锟缴拷锟缴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟絎HITE_BRUSH锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟铰的★拷

锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟铰猴拷锟斤拷锟斤拷锟侥憋拷Windows锟斤拷锟斤拷锟斤拷锟斤拷锟较讹拷谋锟斤拷锟缴拷锟�

SetBkColor (hdc, crColor) ;

锟诫画锟斤拷色锟斤拷锟斤拷使锟矫碉拷crColor锟斤拷锟斤拷一锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷谋锟斤拷锟缴拷锟轿拷锟缴拷锟斤拷锟斤拷锟酵拷锟斤拷锟紾etBkColor锟斤拷取锟斤拷装锟斤拷锟斤拷锟斤拷锟叫讹拷锟斤拷锟侥壳帮拷锟斤拷锟缴拷锟�

通锟斤拷锟斤拷锟斤拷锟斤拷模式转锟斤拷为TRANSPARENT锟斤拷锟斤拷锟斤拷锟斤拷止Windows锟斤拷锟斤拷锟较讹拷锟�

SetBkMode (hdc, TRANSPARENT) ;

锟斤拷锟结，Windows锟斤拷锟斤拷锟皆憋拷锟斤拷色锟斤拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟较讹拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟紾etBkMode锟斤拷取锟斤拷目前锟斤拷锟斤拷模式锟斤拷TRANSPARENT锟斤拷锟斤拷OPAQUE锟斤拷锟斤拷

锟斤拷图锟斤拷式
锟斤拷

装锟斤拷锟斤拷锟斤拷锟叫讹拷锟斤拷幕锟酵硷拷锟绞揭灿帮拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷叩锟斤拷锟桔★拷锟斤拷锟诫画锟斤拷锟斤拷一锟斤拷直锟竭ｏ拷锟斤拷锟斤拷色锟斤拷锟缴伙拷锟斤拷色锟绞和伙拷锟斤拷锟斤拷锟斤拷原锟斤拷锟斤拷色锟绞癸拷同锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷同一锟街伙拷锟斤拷锟节帮拷色锟斤拷锟斤拷锟较伙拷锟斤拷锟斤拷锟竭讹拷锟节猴拷色锟斤拷锟斤拷锟较伙拷锟斤拷锟斤拷锟竭ｏ拷锟斤拷锟揭诧拷锟斤拷知锟斤拷锟斤拷锟斤拷锟斤拷什么色锟绞★拷锟斤拷锟斤拷锟侥癸拷锟杰讹拷锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷图锟斤拷式锟斤拷锟借定锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷实锟斤拷锟斤拷

锟斤拷Windows使锟矫伙拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷实锟斤拷锟斤拷执锟叫伙拷锟斤拷图锟斤拷锟斤拷目锟斤拷位锟矫达拷原锟斤拷图锟斤拷之锟斤拷锟侥筹拷锟轿辉拷锟斤拷锟斤拷锟斤拷恪Ｍ硷拷丶锟斤拷位元锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿辉筹拷锟斤拷锟斤拷恪癸拷锟斤拷锟斤拷为锟斤拷ROP锟斤拷锟斤拷锟斤拷於伙拷一锟斤拷直锟斤拷只锟芥及锟斤拷锟斤拷图锟截ｏ拷锟斤拷锟绞猴拷目锟疥）锟斤拷锟斤拷锟斤拷锟斤拷植锟斤拷锟斤拷锟斤拷锟斤拷殖锟轿拷锟斤拷锟皆辉筹拷锟斤拷锟斤拷恪癸拷锟斤拷锟斤拷为锟斤拷ROP2锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷16锟斤拷ROP2锟斤拷锟诫，锟斤拷示Windows锟斤拷匣锟斤拷锟酵硷拷睾锟侥匡拷锟酵硷拷氐姆锟绞斤拷锟斤拷锟斤拷诙锟阶帮拷锟斤拷锟斤拷锟斤拷校锟斤拷锟酵硷拷锟绞斤拷锟斤拷锟轿猂2_COPYPEN锟斤拷锟斤拷锟斤拷味锟斤拷Windows只锟角斤拷锟斤拷锟斤拷图锟截革拷锟狡碉拷目锟斤拷图锟截ｏ拷锟斤拷也锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷知锟侥★拷锟斤拷锟解，锟斤拷锟斤拷15锟斤拷ROP2锟诫。

16锟街诧拷同锟斤拷ROP2锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟截ｏ拷为锟斤拷示锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟角硷拷锟斤拷使锟矫碉拷色系统锟斤拷目锟斤拷色锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷锟缴拷剩锟轿拷锟缴拷锟斤拷锟�0锟斤拷锟斤拷示锟斤拷锟斤拷锟竭帮拷色锟斤拷锟斤拷1锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷为锟斤拷色锟斤拷锟竭帮拷色锟斤拷锟矫猴拷色锟斤拷锟竭帮拷色锟斤拷锟斤拷锟节猴拷色锟斤拷锟竭帮拷色目锟斤拷锟较伙拷图锟斤拷锟斤拷锟斤拷锟斤拷希锟斤拷妆锟斤拷锟斤拷目锟疥、锟阶憋拷锟斤拷锟侥匡拷辍拷诒锟斤拷锟斤拷目锟疥、锟节憋拷锟斤拷锟侥匡拷辍�

锟斤拷锟斤拷锟斤拷目锟斤拷锟较伙拷锟斤拷锟斤拷锟矫碉拷什么锟截ｏ拷一锟街匡拷锟斤拷锟角诧拷锟杰伙拷锟绞猴拷目锟斤拷锟缴拷剩锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷呛锟缴拷模锟斤拷锟斤拷只锟酵硷拷锟绞斤拷锟絉OP2锟斤拷锟斤拷R2_BLACK锟斤拷示锟斤拷锟斤拷一锟街匡拷锟斤拷锟斤拷只锟叫碉拷锟斤拷锟斤拷锟斤拷目锟疥都为锟斤拷色时锟斤拷锟斤拷锟斤拷锟侥斤拷锟斤拷锟斤拷前锟缴拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰伙拷锟斤拷锟侥讹拷锟角猴拷色锟斤拷锟斤拷锟斤拷锟斤拷锟狡猴拷锟斤拷些锟斤拷郑锟絎indows锟斤拷锟斤拷为锟斤拷锟街凤拷式锟斤拷锟斤拷一锟斤拷锟斤拷锟街ｏ拷锟斤拷锟斤拷R2_NOTMERGEPEN锟斤拷Windows执锟斤拷目锟斤拷图锟斤拷锟诫画锟斤拷图锟截碉拷位元锟斤拷锟斤拷锟斤拷锟姐，然锟结翻转锟斤拷锟斤拷色锟绞★拷

锟斤拷5-2锟斤拷示锟斤拷锟斤拷锟斤拷16锟斤拷ROP2锟斤拷图锟斤拷式锟斤拷锟斤拷锟斤拷指示锟剿伙拷锟斤拷色锟斤拷(P)锟斤拷目锟斤拷色锟斤拷(D)锟斤拷锟斤拷锟斤拷锟较讹拷锟缴斤拷锟缴拷实摹锟斤拷诒锟斤拷小锟斤拷锟斤拷植锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷校锟斤拷锟紺锟斤拷锟皆的憋拷示锟斤拷锟斤拷锟斤拷锟斤拷目锟斤拷图锟斤拷锟诫画锟斤拷图锟截碉拷锟斤拷戏锟绞斤拷锟�

锟斤拷5-2

锟斤拷锟斤拷 (P): 目锟斤拷 (D):	1 1	1 0	0 1	0 0	锟斤拷锟斤拷锟斤拷锟斤拷	锟斤拷图模式
锟斤拷锟斤拷锟�	0	0	0	0	0	R2_BLACK
	0	0	0	1	~(P \| D)	R2_NOTMERGEPEN
	0	0	1	0	~P & D	R2_MASKNOTPEN
	0	0	1	1	~P	R2_NOTCOPYPEN
	0	1	0	0	P & ~D	R2_MASKPENNOT
	0	1	0	1	~D	R2_NOT
	0	1	1	0	P ^ D	R2_XORPEN
	0	1	1	1	~(P & D)	R2_NOTMASKPEN
	1	0	0	0	P & D	R2_MASKPEN
	1	0	0	1	~(P ^ D)	R2_NOTXORPEN
	1	0	1	0	D	R2_NOP
	1	0	1	1	~P \| D	R2_MERGENOTPEN
	1	1	0	0	P	R2_COPYPEN锟斤拷锟节讹拷锟斤拷
	1	1	0	1	P \| ~D	R2_MERGEPENNOT
	1	1	1	0	P \| D	R2_MERGEPEN
	1	1	1	1	1	R2_WHITE

锟斤拷锟斤拷通锟斤拷锟斤拷锟铰猴拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟借定锟铰的伙拷图模式锟斤拷

SetROP2 (hdc, iDrawMode) ;

iDrawMode锟斤拷锟斤拷锟角憋拷锟叫★拷锟斤拷图模式锟斤拷一锟斤拷锟叫革拷锟斤拷锟斤拷值之一锟斤拷锟斤拷锟斤拷锟斤拷锟矫猴拷式锟斤拷

iDrawMode = GetROP2 (hdc) ;

锟斤拷取锟斤拷目前锟斤拷图锟斤拷式锟斤拷装锟斤拷锟斤拷锟斤拷锟叫碉拷锟节讹拷锟借定为R2_COPYPEN锟斤拷锟斤拷锟矫伙拷锟斤拷色锟斤拷锟斤拷锟侥匡拷锟缴拷省锟斤拷锟絉2_NOTCOPYPEN锟斤拷式锟铰ｏ拷锟斤拷锟斤拷锟斤拷为锟斤拷色锟斤拷锟津画成帮拷色锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷色锟斤拷锟津画成猴拷色锟斤拷R2_BLACK锟斤拷式锟铰ｏ拷锟斤拷锟杰伙拷锟绞和憋拷锟斤拷色为锟斤拷锟斤拷色锟绞ｏ拷锟斤拷锟角伙拷锟缴猴拷色锟斤拷锟斤拷锟斤拷喾达拷锟絉2_WHITE锟斤拷式锟斤拷锟斤拷锟角伙拷锟缴帮拷色锟斤拷R2_NOP锟斤拷式锟斤拷锟角★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷目锟疥保锟街诧拷锟戒。

锟斤拷锟节ｏ拷锟斤拷锟斤拷锟窖撅拷锟斤拷锟斤拷锟剿碉拷色系统锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟较低筹拷遣锟缴拷摹锟斤拷诓锟缴低筹拷校锟絎indows为锟斤拷锟绞猴拷目锟斤拷图锟截碉拷每锟斤拷锟斤拷色位元执锟叫伙拷图锟斤拷式锟斤拷位元锟斤拷锟姐，锟斤拷锟劫达拷使锟斤拷锟较憋拷锟斤拷锟斤拷锟斤拷16锟斤拷ROP2锟斤拷锟诫。R2_NOT锟斤拷图锟斤拷式锟斤拷锟角凤拷转目锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷锟竭碉拷锟斤拷色锟斤拷锟斤拷锟斤拷锟杰伙拷锟绞碉拷色锟斤拷锟斤拷什么锟斤拷锟斤拷锟界，锟斤拷锟斤拷色目锟斤拷锟较碉拷锟竭伙拷锟斤拷锟斤拷色锟斤拷R2_NOT锟斤拷式锟斤拷锟角诧拷锟斤拷锟缴硷拷锟侥伙拷锟绞ｏ拷锟斤拷锟角伙拷锟斤拷锟斤拷锟叫等灰度的憋拷锟斤拷锟较伙拷图锟斤拷锟揭斤拷锟节碉拷锟斤拷锟铰碉拷BLOKOUT锟斤拷式锟斤拷展示R2_NOT锟斤拷图锟斤拷式锟斤拷使锟矫★拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
锟斤拷

锟斤拷锟斤拷锟劫革拷锟斤拷一锟斤拷锟斤拷锟接伙拷锟竭碉拷锟斤拷图锟轿★拷Windows锟斤拷锟竭革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷缘锟斤拷锟斤拷锟斤拷图锟轿的猴拷式锟斤拷於憋拷5-3锟叫★拷

锟斤拷5-3

锟斤拷式	图锟斤拷
Rectangle	直锟角撅拷锟斤拷
Ellipse	锟斤拷圆
RoundRect	圆锟角撅拷锟斤拷
Chord	锟斤拷圆锟斤拷锟较的伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
Pie	锟斤拷圆锟较碉拷圆锟斤拷图
Polygon	锟斤拷锟斤拷锟�
PolyPolygon	锟斤拷锟斤拷锟斤拷锟斤拷

Windows锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷锟侥壳帮拷锟斤拷锟斤拷锟斤拷锟酵硷拷蔚谋呓锟津，边斤拷锟绞癸拷锟侥壳帮拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟缴拷屎突锟酵硷拷锟绞斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷时一锟斤拷锟斤拷锟斤拷锟街憋拷叩锟揭伙拷锟揭诧拷锟斤拷锟斤拷锟斤拷些图锟轿的边斤拷锟�

图锟斤拷锟斤拷目前装锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷幕锟剿拷锟斤拷锟斤拷搿ｏ拷诙锟斤拷锟斤拷锟铰ｏ拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿讹拷锟酵硷拷锟斤拷诓锟斤拷锟斤拷锟轿拷锟缴拷锟絎indows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫伙拷刷锟斤拷WHITE_BRUSH锟斤拷LTGRAY_BRUSH锟斤拷GRAY_BRUSH锟斤拷DKGRAY_BRUSH锟斤拷BLACK_BRUSH锟斤拷NULL_BRUSH 锟斤拷也锟斤拷HOLLOW_BRUSH锟斤拷锟斤拷锟斤拷锟斤拷锟皆斤拷锟轿猴拷一锟斤拷锟斤拷锟叫伙拷刷选锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟酵猴拷锟斤拷选锟斤拷一锟街伙拷锟斤拷一锟斤拷锟斤拷Windbws锟斤拷HBRUSH锟斤拷锟斤拷为锟斤拷刷锟侥达拷锟脚ｏ拷锟斤拷锟皆匡拷锟斤拷锟饺讹拷锟斤拷一锟斤拷锟斤拷刷锟斤拷锟脚憋拷锟斤拷锟斤拷

HBRUSH hBrush ;

锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷GetStockObject锟斤拷取锟斤拷GRAY_BRUSH锟侥达拷锟脚ｏ拷

hBrush = GetStockObject (GRAY_BRUSH) ;

锟斤拷锟斤拷锟皆猴拷锟斤拷SelectObject锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷

SelectObject (hdc, hBrush) ;

锟斤拷锟节ｏ拷锟斤拷锟斤拷锟揭拷锟斤拷媳锟斤拷械锟斤拷锟揭伙拷锟酵硷拷危锟斤拷锟斤拷锟斤拷诓锟斤拷锟轿拷锟缴拷锟�

锟斤拷锟斤拷锟斤拷牖伙拷锟矫伙拷斜呓锟斤拷锟酵硷拷危锟斤拷锟斤拷越锟絅ULL_PEN选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷

SelectObject (hdc, GetStockObject (NULL_PEN)) ;

锟斤拷锟斤拷锟斤拷牖拷锟酵硷拷蔚谋呓锟津，碉拷锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷锟斤拷NULL_BRUSH选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷

SelectObject (hdc, GetStockobject (NULL_BRUSH) ;

锟斤拷也锟斤拷锟斤拷锟皆讹拷锟斤拷刷锟斤拷锟斤拷锟斤拷同锟斤拷锟皆讹拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟角斤拷锟斤拷锟斤拷谈锟斤拷锟斤拷锟斤拷锟斤拷狻�

Polygon锟斤拷式锟酵讹拷锟斤拷锟斤拷锟斤拷敕绞�
锟斤拷

锟斤拷锟窖撅拷锟斤拷锟桔癸拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷牒斤拷锟絇olygon锟角碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭斤拷锟斤拷锟斤拷锟斤拷图锟轿的猴拷式锟斤拷锟矫猴拷式锟侥猴拷锟斤拷锟斤拷Polyline锟斤拷式锟斤拷锟狡ｏ拷

Polygon (hdc, apt, iCount) ;

锟斤拷锟叫ｏ拷apt锟斤拷锟斤拷锟斤拷POINT锟结构锟斤拷一锟斤拷锟斤拷锟叫ｏ拷iCount锟角碉拷锟斤拷锟侥匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷悴煌拷锟斤拷锟絎indows锟斤拷锟斤拷锟劫硷拷一锟斤拷锟竭ｏ拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絇olyline锟斤拷式锟叫ｏ拷Windows锟斤拷锟斤拷锟斤拷么锟斤拷锟斤拷锟斤拷PolyPolygon锟斤拷式锟斤拷锟斤拷锟斤拷示锟斤拷

PolyPolygon (hdc, apt, aiCounts, iPolyCount) ;

锟矫猴拷式锟斤拷锟狡讹拷锟斤拷锟斤拷锟轿★拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥讹拷锟斤拷蔚母锟斤拷锟斤拷锟斤拷锟斤拷每锟斤拷锟斤拷锟斤拷危锟絘iCounts锟斤拷锟叫革拷锟斤拷锟剿讹拷锟斤拷蔚亩说锟斤拷锟斤拷锟絘pt锟斤拷锟叫撅拷锟斤拷全锟斤拷锟斤拷锟斤拷蔚锟斤拷锟斤拷械恪ｏ拷锟斤拷锟斤拷锟街碉拷锟斤拷猓琍olyPolygon锟节癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拇锟斤拷锟斤拷锟酵拷锟�

for (i = 0, iAccum = 0 ; i < iPolyCount ; i++)
{
	Polygon (hdc, apt + iAccum, aiCounts[i]) ;
	iAccum += aiCounts[i] ;
}

锟斤拷锟絇olygon锟斤拷PolyPolygon锟斤拷式锟斤拷Windows使锟矫讹拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟叫碉拷目前锟斤拷刷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷呓锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诓锟斤拷姆锟绞斤拷锟斤拷锟饺★拷锟届抖锟斤拷锟斤拷锟斤拷锟诫方式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷SetPolyFillMode锟斤拷式锟斤拷锟借定锟斤拷

SetPolyFillMode (hdc, iMode) ;

锟节讹拷锟斤拷锟斤拷拢锟斤拷锟斤拷锟斤拷锟斤拷锟诫方式锟斤拷ALTERNATE锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆斤拷锟斤拷锟借定为WINDING锟斤拷锟斤拷锟街凤拷式锟斤拷锟斤拷锟斤拷渭锟酵�5-15锟斤拷示锟斤拷

锟斤拷

图5-15 锟斤拷锟斤拷锟街讹拷锟斤拷锟斤拷锟斤拷敕绞斤拷锟斤拷锟斤拷锟酵硷拷锟紸LTERNATE锟斤拷锟襟）猴拷WINDING锟斤拷锟揭ｏ拷

锟斤拷锟饺ｏ拷ALTERNATE锟斤拷WINDING锟斤拷式之锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟阶诧拷锟斤拷锟斤拷锟斤拷ALTERNATE锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷姆锟斤拷锟斤拷锟斤拷锟节诧拷锟侥点画锟竭ｏ拷只锟叫硷拷锟斤拷锟斤拷叽锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷呓锟斤拷锟绞憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角的角讹拷锟斤拷锟斤拷没锟斤拷锟斤拷锟斤拷锟皆拷锟�

锟斤拷锟斤拷堑锟斤拷锟斤拷锟绞癸拷锟絎INDING锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷锟较革拷锟斤拷一些锟斤拷锟节伙拷锟狡碉拷锟斤拷锟侥讹拷锟斤拷锟绞憋拷锟� 锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷WINDING锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟叫凤拷盏锟斤拷锟斤拷颉５锟斤拷锟揭诧拷锟斤拷锟斤拷狻�

锟斤拷WINDING锟斤拷式锟斤拷要确锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷欠锟斤拷锟斤拷耄拷锟斤拷跃煽锟斤拷锟斤拷锟斤拷锟斤拷锟角革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭★拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭斤拷锟竭ｏ拷锟斤拷锟斤拷捅锟斤拷锟斤拷耄拷锟斤拷ALTERNATE锟斤拷式一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭达拷锟斤拷锟斤拷偶锟斤拷锟斤拷锟竭斤拷锟竭ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷鼙锟斤拷锟斤拷锟揭诧拷锟斤拷懿锟斤拷锟斤拷锟斤拷搿ｏ拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟届都锟斤拷锟斤拷撸锟斤拷谋呓锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟侥边斤拷锟斤拷锟斤拷锟斤拷锟斤拷龋锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟界，锟斤拷锟斤拷图5-16锟叫碉拷锟斤拷锟藉。锟斤拷锟较的硷拷头指锟斤拷锟剿伙拷锟竭的凤拷锟斤拷锟斤拷锟街凤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷盏锟絃锟斤拷锟斤拷锟津，猴拷锟斤拷锟�1锟斤拷3锟斤拷锟斤拷锟斤拷为4锟斤拷5锟斤拷锟斤拷锟斤拷小锟节诧拷锟斤拷锟斤拷锟斤拷ALTERNATE锟斤拷式锟铰诧拷锟结被锟斤拷锟诫。锟斤拷锟角ｏ拷锟斤拷WINDING锟斤拷式锟铰ｏ拷锟斤拷锟斤拷为5锟斤拷锟斤拷锟斤拷岜伙拷锟斤拷耄拷锟轿拷锟斤拷锟斤拷锟斤拷诒锟斤拷氪╋拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟竭诧拷锟杰碉拷锟斤拷图锟斤拷锟解部锟斤拷锟斤拷锟斤拷为4锟斤拷锟斤拷锟津不会被锟斤拷锟诫，锟斤拷为锟斤拷锟诫穿锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟洁反锟斤拷锟竭★拷

锟斤拷锟斤拷锟斤拷锟斤拷锟絎indows没锟斤拷锟斤拷么锟斤拷锟斤拷锟斤拷锟斤拷么锟斤拷式5-5 ALTWIND锟斤拷展示锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷

图5-16 WINDING锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷锟斤拷锟酵硷拷锟�

 锟斤拷式5-5  ALTWIND
ALTWIND.C
/*-------------------------------------------------------------------
	ALTWIND.C --	Alternate and Winding Fill Modes
        			(c) Charles Petzold, 1998
-------------------------------------------------------------------*/

#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (	HINSTANCE hInstance, HINSTANCE hPrevInstance,
             				PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("AltWind") ;
	HWND		hwnd ;
	MSG 		msg ;
	WNDCLASS 	wndclass ;
	wndclass.style		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra	= 0 ;
	wndclass.hInstance	= hInstance ;
	wndclass.hIcon		= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;
     
	if (!RegisterClass (&wndclass))
	{
	MessageBox (	NULL, TEXT ("Program requires Windows NT!"), 
          			szAppName, MB_ICONERROR) ;
		return 0 ;
	}
     
	hwnd = CreateWindow (szAppName, TEXT ("Alternate and Winding Fill Modes"),
				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
     
		ShowWindow (hwnd, iCmdShow) ;
		UpdateWindow (hwnd) ;
     
	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
		return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static POINT aptFigure [10] = {10,70, 50,70, 50,10, 90,10, 90,50,
				     30,50, 30,90, 70,90, 70,30, 10,30 };
	static int	cxClient, cyClient ;
	HDC		hdc ;
	int		i ;
	PAINTSTRUCT	ps ;
	POINT 		apt[10] ;
     
		switch (message)
	{
	case	WM_SIZE:
		cxClient = LOWORD (lParam) ;
 		cyClient = HIWORD (lParam) ;
 		return 0 ;

	case	WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;

		SelectObject (hdc, GetStockObject (GRAY_BRUSH)) ;

		for (i = 0 ; i < 10 ; i++)
		{
			apt[i].x = cxClient * aptFigure[i].x / 200 ;
			apt[i].y = cyClient * aptFigure[i].y / 100 ;
		}

		SetPolyFillMode (hdc, ALTERNATE) ;
		Polygon (hdc, apt, 10) ;

		for (i = 0 ; i < 10 ; i++)
		{
			apt[i].x += cxClient / 2 ;
		}

		SetPolyFillMode (hdc, WINDING) ;
		Polygon (hdc, apt, 10) ;
          
		EndPaint (hwnd, &ps) ;
		return 0 ;
          
	case	WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

图锟轿碉拷锟斤拷锟疥（锟斤拷锟斤拷为100锟斤拷100锟斤拷锟斤拷位锟斤拷锟斤拷锟斤拷锟斤拷aptFigure锟斤拷锟斤拷锟叫★拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷目锟斤拷群透叨然锟斤拷值摹锟斤拷锟绞斤拷锟绞就硷拷锟斤拷锟斤拷危锟揭伙拷锟绞癸拷锟紸LTERNATE锟斤拷锟诫方式锟斤拷锟斤拷一锟斤拷使锟斤拷WINDING锟斤拷式锟斤拷锟斤拷锟斤拷锟酵�5-17锟斤拷

锟斤拷

图5-17 ALTWIND锟斤拷锟斤拷示

锟矫伙拷刷锟斤拷锟斤拷锟节诧拷
锟斤拷

Rectangle锟斤拷RoundRect锟斤拷Ellipse锟斤拷Chord锟斤拷Pie锟斤拷Polygon锟斤拷PolyPolygon图锟轿碉拷锟节诧拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷碉拷目前锟斤拷刷锟斤拷也锟斤拷为锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷摹锟斤拷锟剿拷锟揭伙拷锟�8锟斤拷8锟侥碉拷锟斤拷图锟斤拷锟斤拷水平锟酵达拷直锟斤拷锟截革拷使锟斤拷锟斤拷锟斤拷锟斤拷锟节诧拷锟斤拷锟斤拷

锟斤拷Windows锟矫伙拷色锟侥凤拷锟斤拷锟斤拷锟斤拷示锟斤拷於可达拷锟斤拷示锟斤拷锟较得碉拷锟斤拷色锟斤拷时锟斤拷实锟斤拷锟斤拷锟角斤拷锟斤拷刷锟斤拷锟缴拷省锟斤拷诘锟缴低筹拷希锟絎indows锟杰癸拷使锟矫猴拷色锟酵帮拷色图锟截的伙拷色锟斤拷锟斤拷64锟街诧拷同锟侥伙拷色锟斤拷锟斤拷锟斤拷确锟斤拷说锟斤拷Windows锟杰癸拷锟斤拷锟斤拷64锟街诧拷同锟侥碉拷色锟斤拷刷锟斤拷锟斤拷於达拷锟斤拷色锟斤拷8锟斤拷8锟斤拷锟斤拷图锟叫碉拷锟斤拷锟斤拷位元锟斤拷为0锟斤拷锟斤拷一锟街伙拷色锟斤拷一位元为1锟斤拷锟节讹拷锟街伙拷色锟斤拷锟斤拷位元为1锟斤拷锟皆达拷锟斤拷锟狡ｏ拷直锟斤拷8锟斤拷8锟斤拷锟斤拷图锟斤拷锟斤拷锟斤拷位元锟斤拷为1锟斤拷锟斤拷锟斤拷前锟缴拷锟斤拷锟�16色锟斤拷256色锟斤拷示系统锟较ｏ拷锟斤拷色也锟角碉拷锟斤拷图锟斤拷锟斤拷锟揭匡拷锟皆得碉拷锟斤拷锟斤拷锟缴拷省锟�

Windows锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷呒锟斤拷锟剿拷锟饺伙拷锟酵匡拷使锟斤拷SelectObject锟斤拷锟斤拷刷选锟斤拷装锟斤拷锟斤拷锟捷★拷锟斤拷锟竭硷拷锟斤拷锟斤拷一锟斤拷锟斤拷锟竭硷拷锟斤拷刷也锟斤拷GDI锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谢锟剿拷锟斤拷锟斤拷氡簧撅拷锟斤拷锟斤拷锟斤拷堑锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷芙锟斤拷锟缴撅拷锟斤拷锟�

锟斤拷锟斤拷锟角斤拷锟斤拷锟竭硷拷锟斤拷刷锟侥碉拷一锟斤拷锟斤拷式锟斤拷

hBrush = CreateSolidBrush (crColor) ;

锟斤拷式锟叫碉拷Solid锟斤拷锟斤拷锟斤拷指锟斤拷刷为锟斤拷色锟斤拷锟节斤拷锟斤拷刷选锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷Windows锟斤拷锟斤拷一锟斤拷锟斤拷色色锟侥碉拷锟斤拷图锟斤拷锟斤拷为锟斤拷刷使锟矫该碉拷锟斤拷图锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷水平锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷斜锟斤拷锟斤拷锟斤拷傻摹锟接帮拷弑锟斤拷(hatch marks)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷刷锟斤拷锟斤拷锟街凤拷锟侥伙拷刷锟斤拷锟斤拷色锟斤拷锟斤拷图锟斤拷锟节诧拷锟斤拷锟节伙拷图锟斤拷锟较斤拷锟叫伙拷图锟斤拷锟斤拷锟矫★拷锟斤拷锟斤拷影锟竭伙拷刷锟侥猴拷式为锟斤拷

hBrush = CreateHatchBrush (iHatchStyle, crColor) ;

iHatchStyle锟斤拷锟斤拷锟斤拷锟斤拷影锟竭憋拷堑锟斤拷锟桔★拷图5-18锟斤拷示锟斤拷锟斤拷锟街匡拷锟矫碉拷影锟竭憋拷欠锟斤拷

锟斤拷

图5-18 锟斤拷锟斤拷影锟竭伙拷刷锟斤拷锟�

CreateHatchBrush锟叫碉拷crColor锟斤拷锟斤拷锟斤拷影锟竭碉拷色锟绞★拷锟节斤拷锟斤拷刷选锟斤拷装锟斤拷锟斤拷锟斤拷时锟斤拷Windows锟斤拷锟斤拷锟斤拷色锟斤拷转锟斤拷为锟斤拷之锟斤拷锟斤拷锟斤拷拇锟缴拷锟接帮拷锟街拷锟斤拷锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷卸锟斤拷锟侥憋拷锟斤拷锟斤拷式锟酵憋拷锟斤拷色锟斤拷锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞轿狾PAQUE锟斤拷锟斤拷锟矫憋拷锟斤拷色锟斤拷锟斤拷也锟斤拷转锟斤拷为锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟斤拷目占洹ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷影锟竭猴拷锟斤拷锟斤拷色锟斤拷锟斤拷锟斤拷锟角伙拷色锟斤拷锟缴碉拷锟斤拷色锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞轿猅RANSPARENT锟斤拷锟斤拷Windows只锟斤拷锟斤拷影锟竭ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷锟斤拷锟�

锟斤拷也锟斤拷锟斤拷使锟斤拷CreatePatternBrush锟斤拷CreateDIBPatternBrushPt锟斤拷锟斤拷锟皆硷拷锟侥碉拷锟斤拷图锟斤拷刷锟斤拷

锟斤拷锟斤拷锟竭硷拷锟斤拷刷锟侥碉拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷母锟斤拷锟绞斤拷锟�

hBrush = CreateBrushIndirect (&logbrush) ;

锟斤拷锟斤拷logbrush锟斤拷一锟斤拷锟斤拷态为LOGBRUSH锟斤拷锟斤拷锟竭硷拷锟斤拷刷锟斤拷锟斤拷锟侥结构锟斤拷锟矫结构锟斤拷锟斤拷锟斤拷锟斤拷位锟斤拷锟�5-4锟斤拷示锟斤拷lbStyle锟斤拷位锟斤拷值确锟斤拷锟斤拷Windows锟斤拷谓锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟街碉拷锟�

锟斤拷5-4

lbStyle (UINT)	lbColor (COLORREF)	lbHatch (LONG)
BS_SOLID	锟斤拷刷锟斤拷色锟斤拷	锟斤拷锟斤拷
BS_HOLLOW	锟斤拷锟斤拷	锟斤拷锟斤拷
BS_HATCHED	影锟竭碉拷色锟斤拷	影锟竭伙拷刷锟斤拷锟�
BS_PATTERN	锟斤拷锟斤拷	锟斤拷锟斤拷图锟侥达拷锟斤拷
BS_DIBPATTERNPT	锟斤拷锟斤拷	指锟斤拷DIB锟斤拷指锟斤拷

前锟斤拷锟斤拷锟斤拷锟斤拷SelectObject锟斤拷锟竭硷拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷DeleteObject删锟斤拷锟斤拷锟绞ｏ拷锟斤拷GetObject锟斤拷取锟斤拷锟竭硷拷锟斤拷锟绞碉拷锟斤拷讯锟斤拷锟斤拷於伙拷刷锟斤拷同锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷一锟斤拷锟斤拷取锟矫碉拷锟剿伙拷刷锟斤拷锟脚ｏ拷锟酵匡拷锟斤拷使锟斤拷SelectObject锟斤拷锟矫伙拷刷选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷

SelectObject (hdc, hBrush) ;

然锟结，锟斤拷锟斤拷锟斤拷使锟斤拷DeleteObject锟斤拷式删锟斤拷锟斤拷锟斤拷锟斤拷锟侥伙拷刷锟斤拷

DeleteObject (hBrush) ;

锟斤拷锟角ｏ拷锟斤拷要删锟斤拷目前选锟斤拷装锟斤拷锟斤拷锟捷的伙拷刷锟斤拷

锟斤拷锟斤拷锟斤拷锟揭★拷没锟剿拷锟斤拷锟窖讹拷锟斤拷锟斤拷院锟斤拷锟紾etObject锟斤拷

GetObject (hBrush, sizeof (LOGBRUSH), (LPVOID) &logbrush) ;

锟斤拷锟叫ｏ拷logbrush锟斤拷一锟斤拷锟斤拷态为LOGBRUSH锟侥结构锟斤拷

GDI映锟戒方式
锟斤拷

锟斤拷目前为止锟斤拷锟斤拷锟叫的筹拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖牵锟斤拷锟酵硷拷锟轿拷锟轿伙拷锟酵硷拷摹锟斤拷锟斤拷锟斤拷诙锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷唯一选锟斤拷锟斤拷实锟较ｏ拷锟斤拷映锟戒方式锟斤拷锟斤拷一锟街硷拷锟斤拷影锟斤拷锟轿猴拷锟斤拷示锟斤拷锟斤拷锟酵硷拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷浴锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷裕锟斤拷哟锟皆拷恪拷硬锟皆拷恪拷哟锟斤拷锟轿э拷锟斤拷硬锟斤拷锟轿э拷锟斤拷锟接筹拷浞绞斤拷锟斤拷锟斤拷锟截★拷

锟斤拷锟斤拷锟紾DI锟斤拷图锟斤拷式锟斤拷要锟斤拷锟斤拷值锟斤拷锟叫★拷锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟絋extOut锟斤拷式锟斤拷

TextOut (hdc, x, y, psText, iLength) ;

锟斤拷锟斤拷x锟斤拷y锟街憋拷锟绞撅拷锟斤拷值目锟绞嘉伙拷谩锟斤拷锟斤拷锟絰锟斤拷锟斤拷水平锟斤拷锟较碉拷位锟矫ｏ拷锟斤拷锟斤拷y锟斤拷锟节达拷直锟斤拷锟较碉拷位锟矫ｏ拷通锟斤拷锟斤拷(x,y)锟斤拷锟斤拷示锟斤拷锟斤拷恪�

锟斤拷TextOut锟叫ｏ拷锟皆硷拷锟节硷拷锟斤拷锟斤拷锟斤拷GDI锟斤拷式锟叫ｏ拷锟斤拷些锟斤拷锟斤拷值使锟矫的讹拷锟斤拷一锟街★拷锟竭硷拷锟斤拷位锟斤拷锟斤拷Windows锟斤拷锟诫将锟竭硷拷锟斤拷位转锟斤拷为锟斤拷装锟矫碉拷位锟斤拷锟斤拷锟斤拷图锟截★拷锟斤拷锟斤拷转锟斤拷锟斤拷锟斤拷映锟戒方式锟斤拷锟接达拷锟斤拷锟接诧拷锟斤拷原锟斤拷锟皆硷拷锟接达拷锟斤拷锟接诧拷锟侥凤拷围锟斤拷锟斤拷锟狡的★拷映锟戒方式锟斤拷指示锟斤拷x锟斤拷锟統锟斤拷姆锟斤拷锟�(orientation)锟斤拷也锟斤拷锟斤拷说锟斤拷锟斤拷确锟斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷贫锟绞眡锟斤拷值锟斤拷锟斤拷锟斤拷锟角硷拷小锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟狡讹拷时y锟斤拷值锟斤拷锟斤拷锟斤拷锟角硷拷小锟斤拷

Windows锟斤拷锟斤拷锟斤拷8锟斤拷映锟戒方式锟斤拷锟斤拷锟斤拷锟斤拷WINGDI.H锟斤拷锟斤拷应锟斤拷识锟斤拷锟街和猴拷锟斤拷锟斤拷锟�5-5锟斤拷示锟斤拷

锟斤拷5-5

映锟戒方式	锟竭硷拷锟斤拷位	锟斤拷锟斤拷值
映锟戒方式	锟竭硷拷锟斤拷位	x值	y值
MM_TEXT	图锟斤拷	锟斤拷	锟斤拷
MM_LOMETRIC	0.1 mm	锟斤拷	锟斤拷
MM_HIMETRIC	0.01 mm	锟斤拷	锟斤拷
MM_LOENGLISH	0.01 in.	锟斤拷	锟斤拷
MM_HIENGLISH	0.001 in.	锟斤拷	锟斤拷
MM_TWIPS	1/1440 in.	锟斤拷	锟斤拷
MM_ISOTROPIC	锟斤拷锟斤拷(x = y)	锟斤拷选	锟斤拷选
MM_ANISOTROPIC	锟斤拷锟斤拷(x != y)	锟斤拷选	锟斤拷选

METRIC锟斤拷ENGLISH指一锟斤拷通锟叫的讹拷锟斤拷锟斤拷系统锟斤拷锟斤拷锟斤拷印刷锟侥诧拷锟斤拷锟斤拷位锟斤拷约锟斤拷锟�1/72英锟界，锟斤拷锟斤拷图锟轿筹拷式锟斤拷锟斤拷屑俣锟轿拷锟斤拷锟�1/72英锟界。锟斤拷Twip锟斤拷锟斤拷锟�1/20锟姐，也锟斤拷锟斤拷1/1440英锟界。锟斤拷Isotropic锟斤拷锟酵★拷anisotropic锟斤拷锟斤拷锟斤拷锟斤拷锟侥碉拷锟街ｏ拷锟斤拷思锟角★拷锟饺凤拷锟皆★拷锟斤拷同锟斤拷锟津）和★拷锟届方锟皆★拷锟斤拷锟斤拷同锟斤拷锟津）★拷

锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷瓒ㄓ筹拷浞绞斤拷锟�

SetMapMode (hdc, iMapMode) ;

锟斤拷锟叫ｏ拷iMapMode锟斤拷8锟斤拷映锟戒方式识锟斤拷锟斤拷之一锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟铰猴拷锟斤拷取锟斤拷目前锟斤拷映锟戒方式锟斤拷

iMapMode = GetMapMode (hdc) ;

锟节讹拷映锟戒方式为MM_TEXT锟斤拷锟斤拷锟斤拷锟斤拷映锟戒方式锟铰ｏ拷锟竭硷拷锟斤拷位锟斤拷实锟绞碉拷位锟斤拷同锟斤拷锟斤拷锟斤拷锟斤拷锟角匡拷锟斤拷直锟斤拷锟斤拷图锟斤拷为锟斤拷位锟斤拷锟叫诧拷锟斤拷锟斤拷锟斤拷TextOut锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

TextOut (hdc, 8, 16, TEXT ("Hello"), 5) ;

锟斤拷锟街从撅拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟�8图锟截★拷锟较讹拷16图锟截碉拷位锟矫达拷锟斤拷始锟斤拷

锟斤拷锟接筹拷浞绞斤拷瓒ㄎ狹M_LOENGLISH锟斤拷

SetMapMode (hdc, MM_LOENGLISH) ;

锟斤拷锟竭硷拷锟斤拷位锟角百凤拷之一锟斤拷锟斤拷锟节ｏ拷TextOut锟斤拷锟斤拷锟斤拷锟铰ｏ拷

TextOut (hdc, 50, -100, TEXT ("Hello"), 5) ;

锟斤拷锟街从撅拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟�0.5英锟界、锟较讹拷1英锟斤拷锟轿伙拷么锟斤拷锟绞硷拷锟斤拷锟斤拷y锟斤拷锟斤拷前锟斤拷母锟斤拷牛锟斤拷锟斤拷锟斤拷锟斤拷嵌锟接筹拷浞绞斤拷锟斤拷锟较革拷锟斤拷锟斤拷郏锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷映锟戒方式锟斤拷锟斤拷锟斤拷式锟斤拷锟秸猴拷锟阶★拷印锟斤拷锟斤拷锟侥碉拷锟叫★拷锟斤拷锟斤拷锟斤拷獾ノ伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷锟斤拷辍�

锟斤拷锟斤拷锟斤拷锟轿癸拷锟酵硷拷亟锟斤拷泄锟斤拷锟斤拷芎锟斤拷剩锟斤拷锟矫达拷筒锟揭癸拷锟斤拷诙锟斤拷锟組M_TEXT锟斤拷式锟斤拷锟斤拷魏锟接筹拷浞绞斤拷锟斤拷锟斤拷锟斤拷要锟斤拷英锟斤拷锟斤拷吆锟斤拷壮叽锟斤拷锟绞就硷拷锟斤拷锟矫达拷锟斤拷源锟紾etDeviceCaps锟斤拷取锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷讯锟斤拷锟皆硷拷锟劫斤拷锟斤拷锟斤拷锟脚★拷锟斤拷锟斤拷映锟戒方式锟斤拷锟角憋拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟脚碉拷一锟斤拷锟斤拷锟斤拷途锟斤拷锟斤拷锟窖★拷

锟斤拷然锟斤拷锟斤拷GDI锟斤拷式锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷32位元锟斤拷值锟斤拷锟斤拷锟角斤拷锟斤拷Windows NT锟杰癸拷锟斤拷锟斤拷全32位元锟斤拷锟斤拷Windows 98锟叫ｏ拷锟斤拷锟疥被锟斤拷锟斤拷为16位元锟斤拷锟斤拷围锟斤拷-32,768锟斤拷32,767锟斤拷一些使锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷蔚目锟绞硷拷锟酵斤拷锟斤拷锟斤拷锟絎indows锟斤拷式也要锟斤拷锟斤拷蔚目锟斤拷透锟叫§痘锟斤拷叩锟斤拷32,767锟斤拷

装锟斤拷锟斤拷锟斤拷锟斤拷呒锟斤拷锟斤拷锟�
锟斤拷

锟斤拷也锟斤拷锟斤拷锟绞ｏ拷锟斤拷锟绞癸拷锟組M_LOENGLISH映锟戒方式锟斤拷锟角诧拷锟角斤拷锟斤拷玫锟斤拷园俜锟街挥拷锟轿拷锟轿伙拷锟絎M_SIZE讯息锟截ｏ拷锟斤拷锟皆诧拷锟结。Windows锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷WM_MOVE锟斤拷WM_SIZE锟斤拷WM_MOUSEMOVE锟斤拷锟斤拷锟斤拷锟斤拷锟叫凤拷GDI锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷一些GDI锟斤拷式锟斤拷锟斤拷远使锟斤拷装锟斤拷锟斤拷锟疥。锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角ｏ拷锟斤拷锟接筹拷浞绞斤拷锟揭伙拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷裕锟斤拷锟斤拷裕锟街伙拷卸锟斤拷锟揭帮拷锟斤拷锟斤拷荽锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI锟斤拷式锟斤拷映锟戒方式锟脚伙拷锟斤拷锟斤拷锟矫★拷GetSystemMetrics锟斤拷锟斤拷GDI锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟矫碉拷位锟斤拷锟斤拷图锟截ｏ拷为锟斤拷锟斤拷锟斤拷锟斤拷锟截达拷小锟侥★拷锟斤拷锟斤拷GetDeviceCaps锟斤拷GDI锟斤拷式锟斤拷锟斤拷要一锟斤拷装锟斤拷锟斤拷锟捷达拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Windows锟斤拷然锟斤拷HORZRES锟斤拷VERTRES锟斤拷装锟矫碉拷位锟斤拷为锟斤拷锟斤拷值锟斤拷锟斤拷为锟矫猴拷式锟斤拷目锟斤拷之一锟斤拷锟角革拷锟斤拷式锟结供锟斤拷图锟斤拷为锟斤拷位锟斤拷锟借备锟斤拷小锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷GetTextMetrics锟斤拷锟斤拷锟叫达拷锟截碉拷TEXTMETRIC锟结构锟斤拷值锟斤拷使锟斤拷锟竭硷拷锟斤拷位锟侥★拷锟斤拷锟斤拷诮锟斤拷写撕锟斤拷锟绞庇筹拷浞绞轿狹M_LOENGLISH锟斤拷锟斤拷GetTextMetrics锟斤拷锟皆百凤拷之一英锟斤拷为锟斤拷位锟结供锟斤拷元锟侥匡拷锟饺和高度★拷锟节猴拷锟斤拷GetTextMetrics锟斤拷取锟矫癸拷锟斤拷锟皆拷目锟斤拷群透叨锟斤拷锟窖妒憋拷锟接筹拷浞绞斤拷锟斤拷锟斤拷瓒拷筛锟斤拷锟斤拷锟叫╋拷锟窖讹拷锟斤拷锟斤拷锟斤拷时锟斤拷使锟矫碉拷映锟戒方式锟斤拷锟斤拷锟斤拷锟酵匡拷锟皆简化癸拷锟斤拷锟斤拷

装锟斤拷锟斤拷锟斤拷系
锟斤拷

Windows锟斤拷GDI锟斤拷式锟斤拷指锟斤拷锟斤拷锟竭硷拷锟斤拷锟斤拷映锟斤拷为装锟斤拷锟斤拷锟疥。锟斤拷锟斤拷锟斤拷锟皆革拷锟街诧拷同锟斤拷映锟戒方式使锟斤拷锟竭硷拷锟斤拷锟斤拷系之前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷Windows为锟斤拷讯锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷牟锟酵拷锟阶帮拷锟斤拷锟斤拷锟较碉拷锟斤拷锟斤拷锟斤拷锟斤拷谴锟斤拷锟斤拷时锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟节癸拷锟斤拷锟斤拷锟斤拷Windows锟节诧拷同锟斤拷时锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷图锟斤拷为锟斤拷位锟斤拷水平锟结（锟斤拷x锟结）锟较碉拷值锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷锟斤拷直锟结（锟斤拷y锟结）锟较碉拷值锟斤拷锟较碉拷锟铰碉拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷萤幕时锟斤拷锟酵革拷锟捷★拷萤幕锟斤拷锟疥」锟斤拷锟叫诧拷锟斤拷锟斤拷萤幕锟斤拷锟斤拷锟较斤拷为(0,0)锟姐，萤幕锟斤拷锟斤拷锟斤拷锟斤拷WM_MOVE讯息锟斤拷锟斤拷於凤拷锟斤拷锟接达拷锟斤拷锟皆硷拷锟斤拷锟斤拷Windows锟斤拷式锟叫ｏ拷CreateWindow锟斤拷MoveWindow锟斤拷锟斤拷锟角讹拷於凤拷锟斤拷锟接达拷锟斤拷锟斤拷GetMessagePos锟斤拷GetCursorPos锟斤拷SetCursorPos锟斤拷GetWindowRect锟皆硷拷WindowFromPoint锟斤拷锟解不锟斤拷全锟斤拷锟斤拷式锟斤拷锟叫憋拷锟斤拷锟斤拷锟斤拷锟角伙拷锟斤拷锟斤拷锟斤拷锟接达拷锟睫关的猴拷式锟斤拷锟斤拷锟斤拷锟斤拷锟轿标函式锟斤拷锟斤拷锟斤拷锟斤拷锟角憋拷锟斤拷锟斤拷锟斤拷某锟斤拷萤幕锟斤拷锟斤拷锟狡讹拷锟斤拷锟斤拷锟斤拷寻锟揭ｏ拷锟接达拷锟侥猴拷式锟斤拷锟斤拷锟斤拷锟紻ISPLAY为锟斤拷锟斤拷锟斤拷锟斤拷CreateDC锟斤拷锟斤拷取锟斤拷锟斤拷锟斤拷萤幕锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟节讹拷锟斤拷锟斤拷锟紾DI锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟竭硷拷锟斤拷锟疥将锟斤拷映锟斤拷为萤幕锟斤拷锟疥。

锟斤拷全锟接达拷锟斤拷锟疥」锟皆筹拷式锟斤拷锟斤拷锟斤拷锟接达拷为锟斤拷准锟斤拷锟斤拷锟斤拷锟斤拷小锟斤拷锟斤拷鼙锟斤拷锟斤拷锟斤拷锟斤拷泻锟斤拷哟锟斤拷蚨及锟斤拷锟斤拷锟斤拷凇锟斤拷锟斤拷锟斤拷锟斤拷通锟接达拷锟斤拷锟姐（0,0锟斤拷锟斤拷锟斤拷锟脚边匡拷锟斤拷锟斤拷辖恰锟饺拷哟锟斤拷锟斤拷锟斤拷锟絎indows锟叫硷拷锟斤拷使锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟紾etWindowDC取锟斤拷装锟斤拷锟斤拷锟捷ｏ拷GDI锟斤拷式锟叫碉拷锟竭硷拷锟斤拷锟斤拷突锟阶拷锟轿拷锟绞撅拷锟斤拷锟斤拷锟斤拷辍�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷锟斤拷锟筋常使锟矫的★拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷锟姐（0,0锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖恰锟斤拷锟绞癸拷锟紾etDC锟斤拷BeginPaint取锟斤拷装锟斤拷锟斤拷锟斤拷时锟斤拷GDI锟斤拷式锟叫碉拷锟竭硷拷锟斤拷锟斤拷突锟斤拷诙锟阶拷锟轿拷锟绞撅拷锟斤拷锟斤拷锟斤拷辍�

锟矫猴拷式ClientToScreen锟斤拷ScreenToClient锟斤拷锟皆斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷转锟斤拷为萤幕锟斤拷锟疥，锟斤拷锟竭凤拷锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟斤拷锟斤拷转锟斤拷为锟斤拷示锟斤拷锟斤拷锟斤拷锟疥。也锟斤拷锟斤拷使锟斤拷GetWindowRect锟斤拷式取锟斤拷萤幕锟斤拷锟斤拷锟铰碉拷锟斤拷锟斤拷锟接达拷锟斤拷位锟矫和达拷小锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式为一锟斤拷装锟斤拷锟斤拷锟斤拷转锟斤拷为锟斤拷一锟斤拷锟结供锟斤拷锟姐够锟斤拷锟斤拷讯锟斤拷

锟接诧拷锟斤拷锟接达拷
锟斤拷

映锟戒方式锟斤拷锟斤拷锟斤拷Windows锟斤拷谓锟紾DI锟斤拷式锟斤拷指锟斤拷锟斤拷锟竭硷拷锟斤拷锟斤拷映锟斤拷为装锟斤拷锟斤拷锟疥，锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟较等★拷锟斤拷锟斤拷锟斤拷锟侥革拷锟斤拷式锟斤拷取锟斤拷装锟斤拷锟斤拷锟捷★拷要锟斤拷锟斤拷锟斤拷锟斤拷映锟戒方式锟斤拷锟斤拷锟斤拷锟斤拷要一些锟斤拷锟斤：映锟戒方式锟斤拷於讹拷锟斤拷印锟斤拷哟锟斤拷锟斤拷锟斤拷呒锟斤拷锟斤拷辏╋拷锟斤拷锟斤拷硬锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷辏╋拷锟接筹拷洹�

锟斤拷锟接达拷锟斤拷锟酵★拷锟接诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫得诧拷锟斤拷恰锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟轿斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟接诧拷通锟斤拷锟斤拷锟斤拷锟叫硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿硷拷锟斤拷锟斤拷遥锟斤拷锟斤拷锟斤拷丫锟斤拷锟斤拷哟锟斤拷锟街革拷锟绞斤拷锟接┠伙拷锟秸硷拷莸锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟角憋拷锟斤拷压锟斤拷锟斤拷些锟绞碉拷锟斤拷锟斤拷之锟斤拷锟斤拷锟斤拷一锟竭★拷

锟斤拷锟接诧拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟疥（图锟截ｏ拷锟侥★拷通锟斤拷锟斤拷锟接诧拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷同锟斤拷锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷丫锟斤拷锟紾etWindowDC锟斤拷CreateDC取锟斤拷锟斤拷一锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟接诧拷也锟斤拷锟斤拷锟斤拷指锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟接┠伙拷锟斤拷辍ｏ拷锟�(0,0)锟斤拷锟斤拷示锟斤拷锟津（伙拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷萤幕锟斤拷锟斤拷锟斤拷锟较角ｏ拷x锟斤拷值锟斤拷锟斤拷锟斤拷锟接ｏ拷y锟斤拷值锟斤拷锟斤拷锟斤拷锟接★拷

锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟斤拷锟斤拷模锟斤拷呒锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟截★拷锟斤拷锟阶★拷英锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷魏锟斤拷锟斤拷锟斤拷锟轿伙拷锟斤拷锟斤拷锟紾DI锟斤拷图锟斤拷式锟斤拷指锟斤拷锟竭硷拷锟接达拷锟斤拷锟疥。

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟较ｏ拷锟接诧拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷学锟较的革拷锟筋。锟斤拷锟斤拷锟斤拷械锟接筹拷浞绞斤拷锟絎indows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟接达拷锟斤拷锟竭硷拷锟斤拷锟斤拷锟斤拷转锟斤拷为锟接诧拷锟斤拷锟借备锟斤拷锟斤拷锟疥：

锟斤拷

锟斤拷锟叫ｏ拷(xWindow,yWindow)锟角达拷转锟斤拷锟斤拷锟竭硷拷锟姐，(xViewport,yViewport)锟斤拷转锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟姐，一锟斤拷锟斤拷锟斤拷锟铰差不锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷恕锟�

锟斤拷锟斤拷锟斤拷锟斤拷式使锟斤拷锟剿分憋拷指锟斤拷锟接达拷锟斤拷锟接诧拷锟斤拷原锟姐」锟侥点：(xWinOrg锟斤拷yWinOrg)锟斤拷锟竭硷拷锟斤拷锟斤拷锟斤拷哟锟皆拷悖�(xViewOrg,yViewOrg)锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷硬锟皆拷恪ｏ拷锟斤拷诙锟斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷校锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟借定为(0,0)锟斤拷锟斤拷锟斤拷锟斤拷锟角匡拷锟皆改变。锟剿癸拷式锟斤拷味锟斤拷锟斤拷锟竭硷拷锟斤拷(xWinOrg,yWinOrg)锟杰憋拷映锟斤拷为装锟矫碉拷(xViewOrg,yViewOrg)锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷硬锟斤拷锟皆拷锟斤拷锟皆わ拷锟街�(0,0)锟斤拷锟斤拷式锟斤拷为锟斤拷

锟斤拷

锟剿癸拷式锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷围锟斤拷锟斤拷(xWinExt,yWinExt)锟斤拷锟竭硷拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟轿э拷锟�(xViewExt,yViewExt)锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟轿э拷锟斤拷诙锟斤拷锟接筹拷浞绞斤拷校锟斤拷锟轿э拷锟接筹拷浞绞斤拷锟斤拷锟斤拷锟斤拷模锟斤拷锟斤拷芄锟斤拷谋洹Ｃ匡拷锟斤拷锟轿э拷锟斤拷锟矫伙拷锟绞裁达拷锟斤拷澹拷锟斤拷锟斤拷硬锟斤拷锟轿э拷锟斤拷哟锟斤拷锟轿э拷谋锟斤拷锟斤拷锟斤拷呒锟斤拷锟轿蛔拷锟轿帮拷玫锟轿伙拷幕锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟界，锟斤拷锟斤拷锟借定MM_LOENGLISH映锟戒方式时锟斤拷Windows锟斤拷xViewExt锟借定为某锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷xWinExt锟借定为xViewExt图锟斤拷占锟捷碉拷一英锟斤拷锟斤拷锟叫硷拷锟斤拷图锟截的筹拷锟饺★拷锟斤拷值锟斤拷锟斤拷锟斤拷一英锟斤拷锟斤拷锟叫硷拷锟劫革拷图锟截碉拷锟斤拷值锟斤拷为锟斤拷锟斤拷锟阶拷锟叫э拷埽锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞疚拷锟斤拷锟斤拷榷锟斤拷锟斤拷歉锟斤拷锟斤拷锟斤拷锟�

锟斤拷围锟斤拷锟斤拷为锟斤拷锟斤拷也锟斤拷锟斤拷说锟斤拷锟竭硷拷x锟斤拷锟较碉拷值锟斤拷一锟斤拷锟角碉拷锟斤拷锟斤拷锟斤拷时锟斤拷锟接ｏ拷锟竭硷拷y锟斤拷锟较碉拷值锟斤拷一锟斤拷锟角碉拷锟斤拷锟斤拷锟斤拷时锟斤拷锟接★拷

Windows也锟杰斤拷锟接诧拷锟斤拷锟借备锟斤拷锟斤拷锟斤拷转锟斤拷为锟接达拷锟斤拷锟竭硷拷锟斤拷锟斤拷锟疥：

锟斤拷

Windows锟结供锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷装锟矫碉拷转锟斤拷为锟竭硷拷锟斤拷锟皆硷拷锟斤拷锟竭硷拷锟斤拷转锟斤拷为装锟矫点。锟斤拷锟斤拷暮锟绞斤拷锟阶帮拷玫锟阶拷锟轿拷呒锟斤拷悖�

DPtoLP (hdc, pPoints, iNumber) ;

锟斤拷锟叫ｏ拷pPoints锟斤拷一锟斤拷指锟斤拷POINT锟结构锟斤拷锟叫碉拷指锟疥，锟斤拷iNumber锟斤拷要转锟斤拷锟侥碉拷母锟斤拷锟斤拷锟斤拷锟斤拷岱拷锟斤拷锟斤拷锟斤拷式锟斤拷於斤拷GetClientRect锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷装锟矫碉拷位锟斤拷取锟矫碉拷锟斤拷示锟斤拷锟斤拷锟叫∽拷锟轿拷呒锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷

GetClientRect (hwnd, &rect) ;
DPtoLP (hdc, (PPOINT) &rect, 2) ;

锟斤拷锟斤拷暮锟绞斤拷锟斤拷呒锟斤拷锟阶拷锟轿帮拷玫悖�

LPtoDP (hdc, pPoints, iNumber) ;

锟斤拷锟斤拷MM_TEXT
锟斤拷

锟斤拷锟組M_TEXT映锟戒方式锟斤拷锟节讹拷锟斤拷原锟斤拷头锟轿э拷锟斤拷锟斤拷锟绞撅拷锟�

锟接达拷原锟姐： (0, 0) 锟斤拷锟皆改憋拷

锟接诧拷原锟姐： (0, 0) 锟斤拷锟皆改憋拷

锟接达拷锟斤拷围锟斤拷 (1, 1) 锟斤拷锟缴改憋拷

锟接诧拷锟斤拷围锟斤拷 (1, 1) 锟斤拷锟缴改憋拷

锟接诧拷锟斤拷围锟斤拷锟接达拷锟斤拷围锟侥憋拷锟斤拷为1锟斤拷锟斤拷锟皆诧拷锟斤拷锟斤拷锟竭硷拷锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷锟斤拷锟斤拷拧锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷墓锟绞斤拷锟斤拷约锟轿拷锟�

锟斤拷

锟斤拷锟斤拷映锟戒方式锟斤拷为锟斤拷锟斤拷锟街★拷映锟戒方式锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷屎希锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷姆锟斤拷锟斤拷锟斤拷嵌锟斤拷锟斤拷锟斤拷谴锟斤拷锟斤拷锟斤拷遥锟斤拷锟斤拷锟斤拷锟斤拷碌模锟斤拷锟組M_TEXT锟斤拷同锟斤拷锟侥凤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷

Windows锟结供锟剿猴拷式SetViewportOrgEx锟斤拷SetWindowOrgEx锟斤拷锟斤拷锟斤拷锟侥憋拷锟接诧拷锟斤拷锟接达拷锟斤拷原锟姐，锟斤拷些锟斤拷式锟斤拷锟斤拷锟叫改憋拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟�(0,0)锟斤拷锟斤拷指锟斤拷锟较角★拷一锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷使锟斤拷SetViewportOrgEx锟斤拷SetWindowOrgEx之一锟斤拷锟斤拷锟斤拷锟斤拷同时使锟矫讹拷锟竭★拷

锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷些锟斤拷式锟叫猴拷效锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷硬锟皆拷锟侥憋拷为(xViewOrg,yViewOrg)锟斤拷锟斤拷锟竭硷拷锟斤拷(0.0)锟酵伙拷映锟斤拷为装锟矫碉拷(xViewOrg,yViewOrg)锟斤拷锟斤拷锟斤拷锟斤拷哟锟皆拷锟侥憋拷为(xWinOrg,yWinOrg)锟斤拷锟斤拷锟竭硷拷锟斤拷(xWinOrg,yWinOrg)锟斤拷锟斤拷映锟斤拷为装锟矫碉拷(0,0)锟斤拷锟斤拷锟斤拷锟较角★拷锟斤拷锟杰讹拷锟接达拷锟斤拷锟接诧拷原锟斤拷锟斤拷什么锟侥变，装锟矫碉拷(0,0)始锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖恰锟�

锟斤拷锟界，锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷为cxClient锟斤拷图锟截匡拷锟斤拷cyClient锟斤拷图锟截高★拷锟斤拷锟斤拷虢拷呒锟斤拷锟�(0锟斤拷0)锟斤拷锟斤拷为锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷模锟斤拷山锟斤拷锟斤拷锟斤拷潞锟斤拷校锟�

SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ;

SetViewportOrgEx锟侥诧拷锟斤拷锟斤拷锟斤拷使锟斤拷装锟矫碉拷位锟斤拷锟斤拷锟节ｏ拷锟竭硷拷锟斤拷(0,0)锟斤拷映锟斤拷为装锟矫碉拷(cxClient/2,cyClient/2)锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟较碉拷锟斤拷锟斤拷锟斤拷锟斤拷状锟斤拷

锟斤拷

锟竭硷拷x锟斤拷姆锟轿э拷锟�-cxClient/2锟斤拷+cxClient/2锟斤拷锟竭硷拷y锟斤拷姆锟轿э拷锟�-cyClient/2锟斤拷+cyClient/2锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷陆锟轿拷呒锟斤拷锟� (cxClient/2,cyClient/2)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖强锟绞硷拷锟绞撅拷锟斤拷帧锟斤拷锟斤拷锟揭癸拷酶锟斤拷锟斤拷辏�

TextOut (hdc, -cxClient / 2, -cyClient / 2, "Hello", 5) ;

锟斤拷锟斤拷锟斤拷锟絊etWindowOrgEx锟斤拷锟斤拷锟斤拷锟皆伙拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟絊etViewportOrgEx同锟斤拷锟斤拷效锟斤拷锟斤拷

SetWindowOrgEx (hdc, -cxClient / 2, -cyClient / 2, NULL) ;

SetWindowOrgEx锟侥诧拷锟斤拷锟斤拷锟斤拷使锟斤拷锟竭硷拷锟斤拷位锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街拷幔拷呒锟斤拷锟�(-cxClient / 2,-cyClient / 2)映锟斤拷为装锟矫碉拷(0,0)锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖恰锟�

锟斤拷锟斤拷锟结将锟斤拷锟斤拷锟斤拷锟斤拷式一锟斤拷锟矫ｏ拷锟斤拷锟斤拷锟斤拷知锟斤拷锟斤拷么锟斤拷锟侥斤拷锟斤拷锟�

SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ;
SetWindowOrgEx (hdc, -cxClient / 2, -cyClient / 2, NULL) ;

锟斤拷锟斤拷味锟斤拷锟竭硷拷锟斤拷(-cxClient/2,-cyClient/2)锟斤拷映锟斤拷为装锟矫碉拷(cxClient/2, cyClient/2)锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟较碉拷锟�

锟斤拷

锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式取锟斤拷目前锟接诧拷锟斤拷锟接达拷锟斤拷原锟姐：

GetViewportOrgEx (hdc, &pt) ;
GetWindowOrgEx (hdc, &pt) ;

锟斤拷锟斤拷pt锟斤拷POINT锟结构锟斤拷锟斤拷GetViewportOrgEx锟斤拷锟截碉拷值锟斤拷装锟斤拷锟斤拷锟疥，锟斤拷锟斤拷GetWindowOrgEx锟斤拷锟截碉拷值锟斤拷锟竭硷拷锟斤拷锟疥。

锟斤拷锟斤拷锟斤拷锟斤拷谋锟斤拷硬锟斤拷锟斤拷锟斤拷哟锟斤拷锟皆拷悖拷愿谋锟斤拷哟锟斤拷锟绞撅拷锟斤拷锟斤拷诘锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟界，锟斤拷应使锟斤拷锟斤拷锟节撅拷锟斤拷锟斤拷锟节碉拷锟斤拷锟诫。锟斤拷锟角ｏ拷锟侥憋拷锟接诧拷锟斤拷锟接达拷原锟姐并锟斤拷锟斤拷锟斤拷锟斤拷锟侥憋拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诟谋锟皆拷锟街拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷纾拷诘锟斤拷锟斤拷碌锟絊YSMETS2锟斤拷式锟叫ｏ拷锟斤拷锟斤拷使锟斤拷锟斤拷iVscrollPos值锟斤拷锟斤拷直锟斤拷锟斤拷锟叫碉拷目前位锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟統锟斤拷锟疥：

case 	WM_PAINT:
	hdc = BeginPaint (hwnd, &ps) ;
     
	for (i = 0 ; i < NUMLINES ; i++)
	{
		y = cyChar * (i - iVscrollPos) ;
		// 锟斤拷示锟斤拷锟斤拷	
	}
	EndPaint (hwnd, &ps) ;
	return 0 ;

锟斤拷锟角匡拷锟斤拷使锟斤拷SetWindowOrgEx锟斤拷锟酵拷锟斤拷锟叫э拷锟斤拷锟�

case 	WM_PAINT:
	hdc = BeginPaint (hwnd, &ps) ;

	SetWindowOrgEx (hdc, 0, cyChar * iVscrollPos) ;
     
	for (i = 0 ; i < NUMLINES ; i++)
	{
		y = cyChar * i ;
		// 锟斤拷示锟斤拷锟斤拷
	}
	EndPaint (hwnd, &ps) ;
	return 0 ;

锟斤拷锟节ｏ拷TextOut锟斤拷式锟斤拷y锟斤拷锟斤拷募锟斤拷悴伙拷锟揭猧VscrollPos锟斤拷值锟斤拷锟斤拷锟斤拷味锟斤拷锟斤拷锟斤拷锟皆斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷诺锟揭伙拷锟斤拷锟绞斤拷校锟斤拷锟斤拷媒锟絠VscrollPos值锟斤拷锟斤拷锟矫筹拷式锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷通锟斤拷锟侥憋拷锟接达拷原锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟侥★拷

锟斤拷锟斤拷锟斤拷锟绞癸拷锟街憋拷锟斤拷锟斤拷锟较碉拷锟斤拷锟斤拷芽锟斤拷锟斤拷锟斤拷锟较碉拷锟斤拷木锟斤拷椋拷锟矫达拷锟斤拷呒锟斤拷悖�0,0锟斤拷锟狡碉拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷耄拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺分碉拷每锟斤拷恰锟斤拷锟斤拷牵锟斤拷锟斤拷MM_TEXT映锟戒方式锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷小小锟斤拷锟斤拷锟解：锟窖匡拷锟斤拷锟斤拷锟斤拷系锟叫ｏ拷y值锟斤拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟接的ｏ拷锟斤拷MM_TEXT锟斤拷锟斤拷为锟斤拷锟斤拷时y值锟斤拷锟接★拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷MM_TEXT锟叫碉拷殴郑锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接筹拷浞绞斤拷锟绞癸拷锟酵拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷映锟戒方式
锟斤拷

Windows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟绞尺达拷锟斤拷锟斤拷示锟竭硷拷锟斤拷锟斤拷锟接筹拷浞绞斤拷锟斤拷锟斤拷x锟斤拷锟統锟斤拷锟斤拷呒锟斤拷锟斤拷锟接筹拷锟轿拷锟酵拷锟绞碉拷实锟轿伙拷锟斤拷锟叫┯筹拷浞绞斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷蔚锟皆诧拷途锟斤拷巍锟�

锟斤拷锟斤拷锟街★拷锟斤拷锟斤拷锟斤拷映锟戒方式锟节憋拷5-6锟斤拷锟叫筹拷锟斤拷锟斤拷锟秸从低撅拷锟饺碉拷锟竭撅拷锟饺碉拷顺锟斤拷锟斤拷锟叫★拷锟揭边碉拷锟斤拷锟叫分憋拷锟斤拷锟斤拷锟斤拷锟接拷锟酵猴拷锟斤拷为锟斤拷位时锟竭硷拷锟斤拷位锟侥达拷小锟斤拷锟皆憋拷冉稀锟�

锟斤拷5-6

映锟戒方式	锟竭硷拷锟斤拷位	英锟斤拷	锟斤拷锟斤拷
MM_LOENGLISH	0.01 in.	0.01	0.254
MM_LOMETRIC	0.1 mm.	0.00394	0.1
MM_HIENGLISH	0.001 in.	0.001	0.0254
MM_TWIPS	1/1400 in.	0.000694	0.0176
MM_HIMETRIC	0.01 mm.	0.000394	0.01

锟节讹拷锟接达拷锟斤拷锟接诧拷锟斤拷原锟斤拷头锟轿э拷锟斤拷锟斤拷锟绞撅拷锟�

锟接达拷原锟姐： (0, 0) 锟斤拷锟皆改憋拷

锟接诧拷原锟姐： (0, 0) 锟斤拷锟皆改憋拷

锟接达拷锟斤拷围锟斤拷 (1, 1) 锟斤拷锟缴改憋拷

锟接诧拷锟斤拷围锟斤拷 (1, 1) 锟斤拷锟缴改憋拷

锟绞号憋拷示锟接达拷锟斤拷锟接诧拷锟侥凤拷围锟斤拷锟斤拷锟接筹拷浞绞斤拷锟斤拷璞革拷慕锟斤拷锟斤拷取锟角帮拷锟斤拷丫锟斤拷岬斤拷锟斤拷锟斤拷锟叫╋拷锟轿э拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷潜锟绞撅拷锟斤拷锟绞憋拷捅锟斤拷锟街拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷甑斤拷硬锟斤拷锟斤拷锟斤拷转锟斤拷锟斤拷式锟斤拷

锟斤拷

锟斤拷锟界，锟斤拷锟組M_LOENGLISH锟斤拷Windows锟斤拷锟斤拷姆锟轿э拷锟斤拷拢锟�

锟斤拷

Windows使锟斤拷锟斤拷些锟斤拷锟斤拷GetDeviceCaps锟斤拷锟斤拷锟斤拷锟斤拷讯锟借定锟斤拷围锟斤拷只锟斤拷锟斤拷Windows 98锟斤拷Windows NT之锟斤拷锟斤拷一锟斤拷锟斤拷

锟斤拷锟饺ｏ拷锟斤拷锟斤拷锟斤拷Windows 98锟斤拷锟斤拷锟斤拷锟斤拷模锟斤拷锟斤拷锟斤拷锟绞癸拷谩锟斤拷锟斤拷锟教拷锟斤拷摹锟斤拷锟绞撅拷锟斤拷锟绞窖★拷锟斤拷锟�96 dpi锟斤拷系统锟斤拷锟藉。GetDeviceCaps锟斤拷锟絃OGPIXELSX锟斤拷LOGPIXELSY锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值96锟斤拷Windows为锟接诧拷锟斤拷围使锟斤拷锟斤拷些值锟斤拷锟皆憋拷5-7锟侥凤拷式锟借定锟接诧拷锟斤拷锟接达拷锟侥凤拷围锟斤拷

锟斤拷5-7

映锟戒方式	锟接诧拷锟斤拷围 (x,y)	锟接达拷锟斤拷围 (x,y)
MM_LOMETRIC	(96, 96)	(254, -254)
MM_HIMETRIC	(96, 96)	(2540, -2540)
MM_LOENGLISH	(96, 96)	(100, -100)
MM_HIENGLISH	(96, 96)	(1000, -1000)
MM_TWIPS	(96, 96)	(1440, -1440)

锟斤拷锟斤拷锟斤拷锟斤拷MM_LOENGLISH锟斤拷说锟斤拷96锟斤拷锟斤拷100锟侥憋拷值锟斤拷0.01英锟斤拷锟叫碉拷图锟斤拷锟斤拷锟斤拷锟斤拷MM_LOMETRIC锟斤拷说锟斤拷96锟斤拷锟斤拷254锟侥憋拷值锟斤拷0.1锟斤拷锟斤拷锟叫碉拷图锟斤拷锟斤拷锟斤拷

Windows NT使锟矫诧拷同锟侥凤拷锟斤拷锟借定锟接诧拷锟斤拷锟接达拷锟侥凤拷围锟斤拷锟斤拷锟斤拷锟斤拷16位元锟芥本锟斤拷Windows一锟铰的凤拷锟斤拷锟斤拷锟斤拷锟接诧拷锟斤拷围锟斤拷锟斤拷萤幕锟斤拷图锟截尺寸。锟斤拷锟斤拷使锟斤拷HORZRES锟斤拷VERTRES锟斤拷锟斤拷锟斤拷GetDeviceCaps取锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷锟接达拷锟斤拷围锟斤拷锟捷假讹拷锟斤拷锟斤拷示锟斤拷小锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷HORZSIZE锟斤拷VERTSIZE锟斤拷锟斤拷时锟斤拷GetDeviceCaps锟斤拷锟截的★拷锟斤拷锟斤拷前锟斤拷锟结到锟斤拷锟斤拷锟斤拷些值一锟斤拷锟斤拷320锟斤拷240锟斤拷锟阶★拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟酵硷拷爻叽锟斤拷瓒ㄎ�1024锟斤拷768锟斤拷锟斤拷锟�5-8锟斤拷锟斤拷Windows NT锟斤拷锟斤拷锟斤拷硬锟斤拷锟斤拷哟锟斤拷锟轿э拷锟街碉拷锟�

锟斤拷5-8

映锟戒方式	锟接诧拷锟斤拷围 (x,y)	锟接达拷锟斤拷围 (x,y)
MM_LOMETRIC	(1024, -768)	(3,200, 2,400)
MM_HIMETRIC	(1024, -768)	(32,000, 24,000)
MM_LOENGLISH	(1024, -768)	(1,260, 945)
MM_HIENGLISH	(1024, -768)	(12,598, 9,449)
MM_TWIPS	(1024, -768)	(18,142, 13,606)

锟斤拷些锟接达拷锟斤拷围锟斤拷示锟斤拷锟斤拷锟斤拷示锟斤拷全锟斤拷锟斤拷锟饺和高度碉拷锟竭硷拷锟斤拷位元锟斤拷值锟斤拷320锟斤拷锟阶匡拷锟斤拷萤幕也为1260 MM_LOENGLISH锟斤拷位锟斤拷12.6英锟界（320锟斤拷锟斤拷25.4锟斤拷锟斤拷/英锟界）锟斤拷

锟斤拷围锟叫ｏ拷y前锟斤拷母锟斤拷疟锟绞撅拷谋锟斤拷锟斤拷锟侥凤拷锟津。讹拷锟斤拷锟斤拷锟斤拷锟接筹拷浞绞斤拷锟統值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接ｏ拷然锟斤拷注锟斤拷锟节讹拷锟斤拷锟接达拷锟斤拷锟接诧拷原锟斤拷锟轿�(0,0)锟斤拷锟斤拷锟斤拷锟绞碉拷锟揭伙拷锟斤拷锟饺わ拷慕锟斤拷锟斤拷锟斤拷一锟斤拷始锟侥憋拷为锟斤拷锟斤拷映锟戒方式之一时锟斤拷锟斤拷锟斤拷系锟斤拷锟铰ｏ拷

锟斤拷

要锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷示锟轿何讹拷锟斤拷锟斤拷锟斤拷锟斤拷使锟矫革拷锟斤拷y值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷耄�

SetMapMode (hdc, MM_LOENGLISH) ;
TextOut (hdc, 100, -100, "Hello", 5) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟节撅拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷吆锟斤拷媳吒锟揭挥拷锟侥地凤拷锟斤拷

为锟斤拷使锟皆硷拷锟斤拷锟斤拷头锟斤拷锟斤拷锟窖ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷纸锟斤拷锟届法锟角斤拷锟竭硷拷锟斤拷(0,0)锟斤拷锟斤拷为锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷陆牵锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟絊etViewportOrgEx锟斤拷锟斤拷桑锟斤拷锟斤拷锟絚yClient锟斤拷锟斤拷图锟斤拷为锟斤拷位锟斤拷锟斤拷示锟斤拷锟斤拷母叨龋锟斤拷锟�

SetViewportOrgEx (hdc, 0, cyClient, NULL) ;

锟斤拷时锟斤拷锟斤拷锟斤拷系锟斤拷锟铰ｏ拷

锟斤拷

锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷锟斤拷锟斤拷锟睫★拷

锟斤拷一锟街凤拷锟斤拷锟角斤拷锟竭硷拷(0,0)锟斤拷锟斤拷为锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷模锟�

SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ;

锟斤拷时锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷锟斤拷示锟斤拷

锟斤拷

锟斤拷锟节ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷4锟斤拷锟睫笛匡拷锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷x锟斤拷锟統锟斤拷锟斤拷锟斤拷锟斤拷鹊陌锟接拷纭拷锟斤拷谆锟絫wip锟斤拷锟斤拷锟斤拷呒锟斤拷锟轿伙拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷SetWindowOrgEx锟斤拷式锟斤拷锟侥憋拷锟竭硷拷(0,0)锟姐，锟斤拷锟斤拷锟斤拷锟斤拷微锟斤拷锟斤拷一些锟斤拷锟斤拷为SetWindowOrgEx锟侥诧拷锟斤拷锟斤拷锟斤拷使锟斤拷锟竭硷拷锟斤拷位锟斤拷锟斤拷要锟斤拷(cxClient,cyClient)锟斤拷DPtoLP锟斤拷式转锟斤拷为锟竭硷拷锟斤拷锟疥。锟斤拷锟斤拷锟斤拷锟絧t锟斤拷锟斤拷态为POINT锟侥结构锟斤拷锟斤拷锟斤拷拇锟斤拷虢拷呒锟�(0,0)锟斤拷谋涞斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟诫：

pt.x = cxClient ;
pt.y = cyClient ;
DptoLP (hdc, &pt, 1) ;
SetWindowOrgEx (hdc, -pt.x / 2, -pt.y / 2, NULL) ;

锟斤拷锟斤拷锟叫撅拷锟斤拷锟斤拷锟斤拷映锟戒方式
锟斤拷

剩锟铰碉拷锟斤拷锟斤拷映锟戒方式为MM_ISOTROPIC锟斤拷MM_ANISOTROPIC锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷映锟戒方式锟斤拷锟斤拷锟斤拷锟斤拷锟侥憋拷锟接诧拷锟斤拷锟接达拷锟斤拷围锟斤拷也锟斤拷锟斤拷说锟斤拷锟皆改憋拷Windows锟斤拷锟斤拷转锟斤拷锟竭硷拷锟斤拷装锟斤拷锟斤拷锟斤拷幕锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絠sotropic锟斤拷锟斤拷锟斤拷思锟角★拷同锟斤拷锟斤拷锟皆★拷锟斤拷锟斤拷anisotropic锟斤拷锟斤拷锟斤拷思锟角★拷锟届方锟斤拷锟皆★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟桔的讹拷锟斤拷映锟戒方式锟斤拷锟狡ｏ拷MM_ISOTROPIC使锟斤拷锟斤拷同锟斤拷锟结，x锟斤拷锟较碉拷锟竭硷拷锟斤拷位锟斤拷y锟斤拷锟较碉拷锟竭硷拷锟斤拷位锟斤拷实锟绞尺达拷锟斤拷取锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷猴拷锟斤拷锟斤拷锟绞撅拷锟斤拷薰氐锟酵硷拷锟斤拷锟斤拷邪锟斤拷锟斤拷摹锟�

MM_ISOTROPIC锟斤拷锟斤拷锟接筹拷浞绞街拷锟斤拷锟斤拷锟斤拷锟角ｏ拷使锟斤拷MM_ISOTROPIC锟斤拷锟斤拷锟斤拷锟皆匡拷锟斤拷锟竭硷拷锟斤拷位锟斤拷实锟绞尺寸。锟斤拷锟皆革拷猓拷锟斤拷锟斤拷愿锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥达拷小锟斤拷锟斤拷锟斤拷锟竭硷拷锟斤拷位锟斤拷实锟绞尺寸，锟接讹拷使锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷锟角帮拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟节ｏ拷锟斤拷锟斤拷应锟截放达拷锟斤拷锟叫★拷锟斤拷锟斤拷纾拷诎锟斤拷碌锟斤拷锟斤拷锟绞憋拷映锟绞斤拷锟斤拷欠锟斤拷锟酵拷缘锟斤拷锟斤拷印锟斤拷锟斤拷锟斤拷谋锟斤拷哟锟斤拷锟叫∈憋拷锟绞憋拷锟揭诧拷锟接︼拷氐锟斤拷锟斤拷锟�

Windows锟斤拷式锟斤拷全锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟接诧拷锟斤拷围锟斤拷锟斤拷锟斤拷图锟斤拷锟叫★拷谋浠拷锟斤拷锟剿ｏ拷锟斤拷锟斤拷锟接达拷锟竭达拷锟斤拷锟斤拷锟戒，锟斤拷式锟斤拷锟斤拷锟斤拷锟节伙拷图锟斤拷式锟斤拷使锟斤拷锟斤拷同锟斤拷锟竭硷拷锟斤拷位锟斤拷

锟斤拷时锟斤拷MM_TEXT锟酵讹拷锟斤拷映锟戒方式锟斤拷为锟斤拷锟斤拷全锟斤拷锟斤拷锟皆★拷映锟戒方式锟斤拷锟斤拷锟斤拷锟剿碉拷锟斤拷锟斤拷锟斤拷芨谋锟斤拷哟锟斤拷锟斤拷硬锟斤拷姆锟轿э拷约锟絎indows锟斤拷锟竭硷拷锟斤拷锟疥换锟斤拷为装锟斤拷锟斤拷锟斤拷姆锟斤拷锟斤拷锟組M_ISOTROPIC锟斤拷一锟街★拷锟斤拷锟斤拷锟斤拷浴锟斤拷锟接筹拷浞绞斤拷锟絎indows锟斤拷锟斤拷锟斤拷锟侥憋拷锟接达拷锟斤拷锟接诧拷锟斤拷围锟斤拷锟斤拷只锟角碉拷锟斤拷锟斤拷锟角ｏ拷锟皆憋拷x锟斤拷y锟竭硷拷锟斤拷位锟斤拷锟斤拷同锟斤拷锟斤拷实锟绞尺寸。MM_ANISOTROPIC映锟戒方式锟角★拷锟角撅拷锟斤拷锟皆★拷锟侥ｏ拷锟斤拷锟斤拷锟皆改憋拷锟接达拷锟斤拷锟接诧拷锟斤拷围锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷锟斤拷些值锟斤拷

MM_ISOTROPIC映锟戒方式
锟斤拷

锟斤拷锟斤拷锟揭拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷证锟斤拷锟斤拷锟斤拷锟较碉拷锟竭硷拷锟斤拷位锟斤拷同锟斤拷锟斤拷MM_ISOTROPIC映锟戒方式锟斤拷锟斤拷锟斤拷锟斤拷锟接筹拷浞绞斤拷锟斤拷锟绞憋拷锟斤拷锟斤拷锟斤拷锟酵拷呒锟斤拷锟斤拷群透叨鹊木锟斤拷锟斤拷锟绞疚拷锟斤拷锟斤拷危锟斤拷锟斤拷锟斤拷锟酵拷呒锟斤拷锟斤拷群透叨鹊锟斤拷锟皆诧拷锟绞疚诧拷锟�

锟斤拷锟斤拷锟秸匡拷始锟斤拷映锟戒方式锟借定为MM_ISOTROPIC时锟斤拷Windows使锟斤拷锟斤拷MM_LOMETRIC同锟斤拷锟斤拷锟接达拷锟斤拷锟接诧拷锟斤拷围锟斤拷锟斤拷锟角ｏ拷锟斤拷要锟皆达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷於ｏ拷锟斤拷锟斤拷锟节匡拷锟皆猴拷锟斤拷SetWindowExtEx锟斤拷SetViewportExtEx锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷偏锟矫改变范围锟剿ｏ拷然锟结，Windows锟斤拷锟斤拷锟斤拷锟斤拷围锟斤拷值锟斤拷锟皆憋拷锟斤拷锟斤拷锟斤拷锟较碉拷锟竭硷拷锟斤拷位锟斤拷锟斤拷同锟斤拷实锟绞撅拷锟诫。

一锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟接达拷锟斤拷锟竭硷拷锟竭达拷锟斤拷为SetWindowExtEx锟侥诧拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟绞碉拷士锟斤拷透锟斤拷锟轿猄etViewportExtEx锟侥诧拷锟斤拷锟斤拷Windows锟节碉拷锟斤拷锟斤拷些锟斤拷围时锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟接达拷锟斤拷应实锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锌锟斤拷艿锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷一锟斤拷锟戒到锟斤拷锟竭硷拷锟接达拷锟斤拷锟斤拷锟芥。锟斤拷锟斤拷锟节猴拷锟斤拷SetViewportExtEx之前锟斤拷锟斤拷SetWindowExtEx锟斤拷锟皆憋拷锟斤拷锟斤拷效锟斤拷使锟斤拷锟斤拷示锟斤拷锟斤拷锟叫的空间。

锟斤拷锟界，锟斤拷锟斤拷锟斤拷锟斤拷要一锟斤拷锟斤拷锟斤拷统锟侥★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷锟斤拷(0,0)锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷陆牵锟斤拷锟斤拷群透叨鹊姆锟轿э拷锟斤拷谴锟�0锟斤拷32,767锟斤拷锟斤拷锟斤拷希锟斤拷x锟斤拷y锟斤拷牡锟轿伙拷锟斤拷锟酵拷锟斤拷锟绞碉拷食叽纭ｏ拷锟斤拷戮锟斤拷锟斤拷锟斤拷锟侥筹拷式锟斤拷

SetMapMode (hdc, MM_ISOTROPIC) ;
SetWindowExtEx (hdc, 32767, 32767, NULL) ;
SetViewportExtEx (hdc, cxClient, -cyClient, NULL) ;
SetViewportOrgEx (hdc, 0, cyClient, NULL) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟紾etWindowExtEx锟斤拷GetViewportExtEx锟斤拷式锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷硬锟斤拷姆锟轿э拷锟斤拷锟斤拷苑锟斤拷郑锟斤拷锟斤拷遣锟斤拷锟斤拷锟斤拷锟角爸革拷锟斤拷锟街碉拷锟絎indows锟斤拷锟斤拷锟斤拷锟斤拷示锟借备锟斤拷锟捷猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿э拷锟斤拷员锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷呒锟斤拷锟轿伙拷锟绞撅拷锟酵拷锟绞碉拷食叽纭�

锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥匡拷锟饺达拷於高度ｏ拷锟斤拷实锟绞尺达拷为准锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷x锟侥凤拷围锟斤拷锟皆憋拷锟竭硷拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟接诧拷窄锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟竭ｏ拷

锟斤拷

Windows 98锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷冶叱锟皆絰锟斤拷姆锟轿е拷锟斤拷锟绞撅拷魏味锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟揭伙拷锟斤拷锟斤拷16位元锟斤拷锟杰憋拷示锟斤拷锟斤拷锟疥。Windows NT使锟斤拷全32位元锟斤拷锟疥，锟斤拷锟斤拷锟斤拷锟节筹拷锟斤拷锟揭憋拷锟斤拷示一些锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥高度达拷於匡拷锟饺ｏ拷锟斤拷实锟绞尺达拷为准锟斤拷锟斤拷锟斤拷么Windows锟斤拷锟斤拷锟斤拷y锟侥凤拷围锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷卤撸锟�

锟斤拷

Windows 98锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷亩锟斤拷锟斤拷锟绞撅拷魏味锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟较ｏ拷锟斤拷呒锟斤拷哟锟斤拷锟斤拷欠锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟较诧拷锟斤拷锟斤拷么锟斤拷前锟斤拷锟斤拷锟斤拷某锟绞斤拷锟斤拷为锟斤拷

SetMapMode (MM_ISOTROPIC) ;
SetWindowExtEx (hdc, 32767, 32767, NULL) ;
SetViewportExtEx (hdc, cxClient, -cyClient, NULL) ;
SetWindowOrgEx (hdc, 0, 32767, NULL) ;

锟节猴拷锟斤拷SetWindowOrgEx锟叫ｏ拷锟斤拷锟斤拷要锟斤拷锟竭硷拷锟斤拷(0, 32767)映锟斤拷为装锟矫碉拷(0,0)锟斤拷锟斤拷锟节ｏ拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥高达拷於匡拷锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷锟斤拷锟斤拷为锟斤拷

锟斤拷锟绞憋拷映锟绞斤拷锟斤拷锟揭诧拷锟斤拷锟揭癸拷锟揭伙拷锟斤拷锟斤拷锟斤拷薜牡芽锟斤拷锟斤拷锟斤拷锟较碉拷锟斤拷母锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷叨瓤锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷锟�(0,0) 锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷搿ｏ拷锟斤拷锟斤拷锟斤拷要每锟斤拷锟斤拷姆锟轿э拷锟�0锟斤拷1000锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷鲁锟绞斤拷耄�

SetMapMode (hdc, MM_ISOTROPIC) ;
SetWindowExtEx (hdc, 1000, 1000, NULL) ;
SetViewportExtEx (hdc, cxClient / 2, -cyClient / 2, NULL) ;
SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ;

锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥匡拷锟饺达拷於高度ｏ拷锟斤拷锟竭硷拷锟斤拷锟斤拷系锟斤拷锟界：

锟斤拷

锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥高度达拷於匡拷锟饺ｏ拷锟斤拷么锟竭硷拷锟斤拷锟斤拷也锟斤拷锟斤拷校锟�

锟斤拷

锟斤拷住锟斤拷锟接达拷锟斤拷锟斤拷锟接诧拷锟斤拷围锟斤拷锟斤拷锟斤拷味锟斤拷要锟斤拷锟叫硷拷锟矫★拷锟节猴拷锟斤拷GDI锟斤拷式时锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷小锟�-1000锟酵达拷锟�1000锟斤拷x锟斤拷y值锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷危锟斤拷锟叫╋拷锟斤拷锟杰匡拷锟矫硷拷锟斤拷也锟斤拷锟杰匡拷锟斤拷锟斤拷锟斤拷

锟斤拷MM_ISOTROPIC映锟戒方式锟铰ｏ拷锟斤拷锟斤拷使锟竭硷拷锟斤拷位锟斤拷锟酵硷拷亍锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟接筹拷浞绞斤拷锟绞癸拷锟�(0,0)锟斤拷示锟斤拷萤幕锟斤拷锟斤拷锟较角ｏ拷y锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷MM_TEXT锟斤拷锟狡ｏ拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟斤拷锟疥单位为1/16英锟界。锟斤拷锟斤拷锟斤拷一锟街凤拷锟斤拷锟斤拷

SetMapMode (hdc, MM_ISOTROPIC) ;
SetWindowExtEx (hdc, 16, 16, NULL) ;
SetViewportExtEx (hdc, GetDeviceCaps (hdc, LOGPIXELSX),
			   GetDeviceCaps (hdc, LOGPIXELSY), NULL) ;

SetWindowExtEx锟斤拷式锟侥诧拷锟斤拷指锟斤拷锟斤拷每一英锟斤拷锟斤拷锟竭硷拷锟斤拷位锟斤拷锟斤拷SetViewportExtEx锟斤拷式锟侥诧拷锟斤拷指锟斤拷锟斤拷每一英锟斤拷锟斤拷实锟绞碉拷位锟斤拷锟斤拷图锟截ｏ拷锟斤拷

然锟斤拷锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷Windows NT锟叫的讹拷锟斤拷映锟戒方式锟斤拷一锟铰★拷锟斤拷些映锟戒方式使锟斤拷锟斤拷示锟斤拷锟斤拷图锟截达拷小锟酵癸拷锟狡达拷小锟斤拷要锟斤拷锟斤拷锟接筹拷浞绞斤拷锟斤拷锟揭伙拷拢锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

SetMapMode (hdc, MM_ISOTROPIC) ;
SetWindowExtEx (hdc, 160 * GetDeviceCaps (hdc, HORZSIZE) / 254,
           160 * GetDeviceCaps (hdc, VERTSIZE) / 254, NULL) ;
SetViewportExtEx (hdc, GetDeviceCaps (hdc, HORZRES),
              GetDeviceCaps (hdc, VERTRES), NULL) ;

锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷校锟斤拷硬锟斤拷锟轿э拷瓒ㄎ拷锟酵硷拷丶锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟侥达拷小锟斤拷锟接达拷锟斤拷围锟斤拷锟斤拷锟斤拷瓒ㄎ拷锟�1/16英锟斤拷为锟斤拷位锟斤拷锟斤拷锟斤拷萤幕锟侥达拷小锟斤拷GetDeviceCaps锟斤拷HORZRES锟斤拷VERTRES为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆猴拷锟斤拷为锟斤拷位锟斤拷装锟矫尺寸。锟斤拷锟斤拷锟斤拷锟绞癸拷酶锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷押锟斤拷锟斤拷锟斤拷锟斤拷锟�25.4锟斤拷转锟斤拷为英锟界，然锟结，锟劫筹拷锟斤拷16锟斤拷转锟斤拷为l/16英锟界。锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷锟绞癸拷玫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷瘸锟斤拷锟�160锟斤拷锟劫筹拷锟斤拷254锟斤拷

锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷使锟竭硷拷锟斤拷位锟斤拷锟绞碉拷实锟轿伙拷锟斤拷锟斤拷璞革拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫讹拷锟斤拷锟斤拷锟斤拷映锟斤拷为锟斤拷1/16英锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷锟酵诧拷锟杰伙拷锟斤拷锟斤拷锟斤拷锟絣/32英锟斤拷锟剿街憋拷撸锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟揭★拷锟斤拷呒锟斤拷锟斤拷辍�

MM_ANISOTROPIC锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷图锟斤拷
锟斤拷

锟斤拷MM_ISOTROPIC映锟戒方式锟斤拷锟借定锟接达拷锟斤拷锟接诧拷锟斤拷围时锟斤拷Windows锟斤拷锟斤拷锟斤拷锟轿э拷锟斤拷员锟斤拷锟斤拷锟斤拷锟斤拷系锟斤拷呒锟斤拷锟轿伙拷锟斤拷锟斤拷锟酵拷锟绞碉拷食叨取锟斤拷锟組M_ANISOTROPIC映锟戒方式锟铰ｏ拷Windows锟斤拷锟斤拷锟斤拷锟斤拷锟借定锟斤拷值锟斤拷锟叫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷锟組M_ANISOTROPIC锟斤拷锟斤拷要维锟斤拷锟斤拷确锟斤拷锟捷猴拷取锟�

使锟斤拷MM_ANISOTROPIC锟斤拷一锟街凤拷锟斤拷锟角讹拷锟斤拷示锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟疥，锟斤拷锟斤拷锟斤拷锟角讹拷MM_ISOTROPIC锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷虢拷锟�(0,0)锟借定为锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷陆牵锟絰锟斤拷锟統锟结都锟斤拷0锟斤拷32,767锟斤拷

SetMapMode (hdc, MM_ANISOTROPIC) ;
SetWindowExtEx (hdc, 32767, 32767, NULL) ;
SetViewportExtEx (hdc, cxClient, -cyClient, NULL) ;
SetViewportOrgEx (hdc, 0, cyClient, NULL) ;

锟斤拷MM_ISOTROPIC锟斤拷式锟铰ｏ拷锟斤拷锟狡的筹拷式锟诫导锟斤拷锟斤拷示锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟侥凤拷围之锟解。锟斤拷锟角讹拷锟組M_ANISOTROPIC锟斤拷锟斤拷锟斤拷锟斤拷叨榷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷辖锟斤拷锟斤拷锟�(32767, 32767)锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷蔚模锟斤拷锟斤拷呒锟絰锟斤拷y锟侥碉拷位锟斤拷锟叫诧拷同锟斤拷实锟绞尺度★拷

前一锟斤拷锟斤拷MM_ISOTROPIC映锟戒方式锟铰ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫伙拷一锟斤拷锟斤拷锟斤拷时锟接碉拷图锟斤拷x锟斤拷y锟斤拷姆锟轿э拷锟斤拷谴锟�-1000锟斤拷+1000锟斤拷锟斤拷锟組M_ANISOTROPIC锟斤拷也锟斤拷锟斤拷写锟斤拷锟斤拷锟狡的筹拷式锟斤拷

SetMapMode (hdc, MM_ANISOTROPIC) ;
SetWindowExtEx (hdc, 1000, 1000, NULL) ;
SetViewportExtEx (hdc, cxClient / 2, -cyClient / 2, NULL) ;
SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ;

锟斤拷MM_ANISOTROPIC锟斤拷式锟斤拷同锟斤拷锟角ｏ拷锟斤拷锟绞憋拷锟揭伙拷锟斤拷锟斤拷锟皆诧拷蔚模锟斤拷锟斤拷锟斤拷锟皆诧拷蔚摹锟�

锟斤拷一锟斤拷使锟斤拷MM_ANISOTROPIC锟侥凤拷锟斤拷锟角斤拷x锟斤拷y锟斤拷牡锟轿伙拷潭锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟饺★拷锟斤拷锟界，锟斤拷锟斤拷锟揭伙拷锟街伙拷锟绞撅拷锟斤拷值某锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷碉拷锟斤拷锟斤拷元锟侥高度和匡拷锟斤拷锟借定一锟街粗刻度碉拷锟斤拷锟疥：

SetMapMode (hdc, MM_ANISOTROPIC) ;
SetWindowExtEx (hdc, 1, 1, NULL) ;
SetViewportExtEx (hdc, cxChar, cyChar, NULL) ;

锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟絚xChar锟斤拷cyChar锟街憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆拷锟斤拷群透叨取锟斤拷锟斤拷冢锟斤拷锟斤拷锟斤拷园锟斤拷锟皆拷泻锟斤拷锟街革拷锟斤拷锟斤拷辍ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟节撅拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆拷锟斤拷媳叨锟斤拷锟斤拷锟皆拷锟斤拷锟绞撅拷锟斤拷郑锟�

TextOut (hdc, 3, 2, TEXT ("Hello"), 5) ;

锟斤拷锟斤拷锟绞癸拷霉潭锟斤拷锟叫★拷锟斤拷锟斤拷锟绞憋拷锟斤拷锟接凤拷锟姐，锟斤拷锟斤拷锟斤拷锟斤拷锟絎HATSIZE锟斤拷式锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷一锟斤拷锟借定MM_ANISOTROPIC映锟戒方式时锟斤拷锟斤拷锟斤拷锟角继筹拷前锟斤拷锟斤拷锟借定锟斤拷映锟戒方式锟侥凤拷围锟斤拷锟斤拷锟杰凤拷锟姐。锟斤拷锟斤拷锟斤拷为MM_ANISOTROPIC锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷围锟斤拷也锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谋锟斤拷哟锟斤拷锟轿э拷锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟斤拷锟斤拷锟組M_LOENGLISH映锟戒方式锟斤拷锟斤拷为希锟斤拷锟竭硷拷锟斤拷位为0.01英锟界，锟斤拷锟斤拷锟斤拷希锟斤拷y锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷樱锟较诧拷锟斤拷锟組M_TEXT锟斤拷锟斤拷锟侥凤拷锟津，硷拷y锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷樱锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷碌拇锟斤拷耄�

SIZE size ;

锟斤拷锟斤拷锟叫筹拷式

SetMapMode (hdc, MM_LOENGLISH) ;
SetMapMode (hdc, MM_ANISOTROPIC) ;
GetViewportExtEx (hdc, &size) ;
SetViewportExtEx (hdc, size.cx, -size.cy, NULL) ;

锟斤拷锟斤拷锟斤拷锟饺斤拷映锟戒方式锟借定为MM_LOENGLISH锟斤拷然锟结，通锟斤拷锟斤拷映锟戒方式锟借定为MM_ANISOTROPIC锟矫凤拷围锟斤拷锟斤拷锟斤拷锟缴改变。GetViewportExtEx取锟斤拷锟接诧拷锟斤拷围锟斤拷锟脚碉拷一锟斤拷SIZE锟结构锟叫ｏ拷然锟结，锟斤拷锟斤拷使锟矫凤拷围锟斤拷锟斤拷锟斤拷SetViewportExtEx锟斤拷只锟斤拷要锟斤拷y锟斤拷围取锟斤拷锟斤拷

WHATSIZE锟斤拷式
锟斤拷

Windows锟斤拷小锟斤拷史锟斤拷锟斤拷一篇锟斤拷锟叫达拷锟絎indows锟斤拷式锟侥斤拷锟斤拷锟斤拷锟铰筹拷锟斤拷锟节★拷Microsoft Systems Journal锟斤拷1986锟斤拷12锟铰猴拷锟较★拷锟斤拷锟斤拷篇锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷WSZ锟斤拷锟斤拷what size锟斤拷什么锟竭寸」锟斤拷锟斤拷锟斤拷锟斤拷图锟截★拷英锟斤拷秃锟斤拷锟轿拷锟轿伙拷锟绞撅拷锟斤拷锟绞撅拷锟斤拷锟侥达拷小锟斤拷锟角革拷锟斤拷式锟侥革拷锟斤拷锟阶版本锟斤拷WHATSIZE锟斤拷锟斤拷锟绞�5-6锟斤拷示锟斤拷锟斤拷式锟斤拷示锟斤拷锟斤拷锟斤拷锟街讹拷锟斤拷映锟戒方式锟斤拷示锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷拇锟叫★拷锟�

 锟斤拷式5-6  WHATSIZE
WHATSIZE.C
/*------------------------------------------------------------
   WHATSIZE.C -- What Size is the Window?
            (c) Charles Petzold, 1998
  ----------------------------------------------------------*/
#include <windows.h>
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
             PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("WhatSize") ;
	HWND		hwnd ;
	MSG 		msg ;
	WNDCLASS	wndclass ;
     
	wndclass.style 		= CS_HREDRAW | CS_VREDRAW;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra	= 0 ;
	wndclass.hInstance	= hInstance ;
	wndclass.hIcon	= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;

	if (!RegisterClass (&wndclass))
	{
		MessageBox (NULL, TEXT ("This program requires Windows NT!"),
              szAppName, MB_ICONERROR) ;
		return 0 ;
	}
     
	hwnd = CreateWindow (szAppName, TEXT ("What Size is the Window?"),
				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
     
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	return msg.wParam ;
}
void Show (HWND hwnd, HDC hdc, int xText, int yText, int iMapMode,
		 TCHAR * szMapMode)
{
	TCHAR szBuffer [60] ;
	RECT  rect ;
     
	SaveDC (hdc) ;
	SetMapMode (hdc, iMapMode) ;
	GetClientRect (hwnd, &rect) ;
	DPtoLP (hdc, (PPOINT) &rect, 2) ;
     
	RestoreDC (hdc, -1) ;
	TextOut (	hdc, xText, yText, szBuffer,
		   	wsprintf (szBuffer, TEXT ("%-20s %7d %7d %7d %7d"), szMapMode,
			rect.left, rect.right, rect.top, rect.bottom)) ;
}  

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static TCHAR szHeading [] =
		TEXT ("Mapping Mode	Left	Right	Top  Bottom") ;
	static TCHAR szUndLine [] = 
		TEXT ("------------   ----   -----	 ---  ------") ;
	static int   cxChar, cyChar ;
	HDC 		hdc ;
	PAINTSTRUCT	ps ;
	TEXTMETRIC	tm ;
     
	switch (message)
	{
	case	WM_CREATE:
		hdc = GetDC (hwnd) ;
		SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
          
		GetTextMetrics (hdc, &tm) ;
		cxChar = tm.tmAveCharWidth ;
		cyChar = tm.tmHeight + tm.tmExternalLeading ;
          
		ReleaseDC (hwnd, hdc) ;
		return 0 ;
          
	case	WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;
		SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
		SetMapMode (hdc, MM_ANISOTROPIC) ;
		SetWindowExtEx (hdc, 1, 1, NULL) ;
		SetViewportExtEx (hdc, cxChar, cyChar, NULL) ;
          
		TextOut (hdc, 1, 1, szHeading, lstrlen (szHeading)) ;
		TextOut (hdc, 1, 2, szUndLine, lstrlen (szUndLine)) ;
          
		Show (hwnd, hdc, 1, 3, MM_TEXT,	TEXT ("TEXT (pixels)")) ;
		Show (hwnd, hdc, 1, 4, MM_LOMETRIC,	TEXT ("LOMETRIC (.1 mm)")) ;
		Show (hwnd, hdc, 1, 5, MM_HIMETRIC,	TEXT ("HIMETRIC (.01 mm)")) ;
		Show (hwnd, hdc, 1, 6, MM_LOENGLISH, TEXT ("LOENGLISH (.01 in)")) ;
		Show (hwnd, hdc, 1, 7, MM_HIENGLISH,TEXT ("HIENGLISH (.001 in)")) ;
		Show (hwnd, hdc, 1, 8, MM_TWIPS,	EXT ("TWIPS (1/1440 in)")) ;
          
		EndPaint (hwnd, &ps) ;
		return 0 ;
          
	case	WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

为锟剿憋拷锟斤拷锟絋extOut锟斤拷式锟斤拷示锟斤拷讯锟斤拷WHATSIZE使锟斤拷锟斤拷一锟街固讹拷锟斤拷锟斤拷锟斤拷锟藉。锟斤拷锟斤拷一锟斤拷锟津单碉拷锟斤拷锟斤拷锟酵匡拷锟斤拷锟叫伙拷为锟教讹拷锟斤拷锟斤拷锟斤拷锟藉（锟斤拷Windows 3.0锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟矫的ｏ拷锟斤拷

SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;

锟斤拷锟斤拷锟斤拷同锟斤拷锟侥猴拷式锟斤拷锟窖∪★拷锟斤拷屎突锟剿拷锟斤拷锟角帮拷锟斤拷岬斤拷模锟絎HATSIZE也使锟斤拷MM_ANISTROPIC映锟戒方式锟斤拷锟竭硷拷锟斤拷位锟借定为锟斤拷元锟斤拷小锟斤拷

锟斤拷WHATSIZE锟斤拷要取锟斤拷锟斤拷锟斤拷映锟戒方式之一锟斤拷锟斤拷示锟斤拷锟斤拷拇锟叫∈憋拷锟斤拷锟斤拷锟斤拷锟侥壳帮拷锟阶帮拷锟斤拷锟斤拷荩锟斤拷瓒ㄒ伙拷锟斤拷碌锟接筹拷浞绞斤拷锟饺★拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷辏拷锟斤拷锟斤拷锟阶拷锟轿拷呒锟斤拷锟斤拷辏伙拷锟斤拷锟斤拷锟绞撅拷锟窖吨帮拷锟斤拷指锟皆筹拷浞绞斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟绞斤拷锟斤拷锟絎HATSIZE锟斤拷Show锟斤拷式锟斤：

SaveDC (hdc) ;
SetMapMode (hdc, iMapMode) ;
GetClientRect (hwnd, &rect) ;
DptoLP (hdc, (PPOINT) &rect, 2) ;
RestoreDC (hdc, -1) ;

图5-19锟斤拷示锟斤拷WHATSIZE锟侥碉拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷

图5-19 锟斤拷锟酵碉拷WHATSIZE锟斤拷示

锟斤拷锟轿★拷锟斤拷锟斤拷图锟斤拷锟�
锟斤拷

Windows锟斤拷锟斤拷锟剿硷拷锟斤拷使锟斤拷RECT锟斤拷锟斤拷锟轿ｏ拷锟结构锟酵★拷锟斤拷锟津」的伙拷图锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟接┠伙拷系锟揭伙拷锟截凤拷锟斤拷锟斤拷锟角撅拷锟轿★拷锟斤拷锟斤拷魏锟斤拷锟皆诧拷锟斤拷锟较★拷

锟斤拷锟轿猴拷式
锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷式锟斤拷要一锟斤拷指锟斤拷锟斤拷谓峁癸拷锟街革拷辏�

FillRect (hdc, &rect, hBrush) ;
FrameRect (hdc, &rect, hBrush) ;
InvertRect (hdc, &rect) ;

锟斤拷锟斤拷些锟斤拷式锟叫ｏ拷rect锟斤拷锟斤拷锟斤拷一锟斤拷RECT锟斤拷态锟侥结构锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷4锟斤拷锟斤拷位锟斤拷left锟斤拷top锟斤拷right锟斤拷bottom锟斤拷锟斤拷锟斤拷峁癸拷械锟斤拷锟斤拷瓯伙拷锟斤拷锟斤拷呒锟斤拷锟斤拷辍�

FillRect锟斤拷指锟斤拷锟斤拷刷锟斤拷锟斤拷锟斤拷锟斤拷危锟街憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟絩ight锟斤拷bottom锟斤拷锟疥）锟斤拷锟矫猴拷式锟斤拷锟斤拷要锟饺斤拷锟斤拷刷选锟斤拷装锟斤拷锟斤拷锟捷★拷

FrameRect使锟矫伙拷刷锟斤拷锟斤拷锟轿框，碉拷锟角诧拷锟斤拷锟斤拷锟斤拷巍锟绞癸拷没锟剿拷锟斤拷锟斤拷慰锟斤拷锟斤拷锟斤拷械锟斤拷锟街ｏ拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷芄锟斤拷暮锟绞斤拷锟斤拷锟絉ectangle锟斤拷锟斤拷锟斤拷锟斤拷叨锟斤拷锟斤拷锟侥壳帮拷锟斤拷驶锟斤拷频摹锟紽rameRect锟斤拷锟斤拷使锟斤拷锟竭伙拷一锟斤拷锟斤拷一锟斤拷为锟斤拷色锟侥撅拷锟轿框。该边斤拷锟轿伙拷锟斤拷呒锟斤拷锟轿辉拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟斤拷位锟斤拷锟阶帮拷玫锟轿伙拷锟斤拷锟竭斤拷蚪锟轿�2锟斤拷图锟截匡拷锟斤拷锟竭革拷锟斤拷锟斤拷

InvertRect锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟截凤拷转锟斤拷1转锟斤拷锟斤拷0锟斤拷0转锟斤拷为1锟斤拷锟矫猴拷式锟斤拷锟斤拷色锟斤拷锟斤拷转锟斤拷珊锟缴拷锟斤拷锟缴拷锟斤拷锟阶拷锟轿拷锟缴拷锟斤拷锟缴拷锟斤拷锟阶拷锟斤拷锟斤拷锟缴拷锟�

Windows锟斤拷锟结供锟斤拷9锟斤拷锟斤拷式锟斤拷使锟斤拷锟斤拷锟皆革拷锟斤拷锟阶★拷锟斤拷锟斤拷锟斤拷夭锟斤拷锟絉ECT锟结构锟斤拷锟斤拷锟界，要锟斤拷RECT锟结构锟斤拷锟侥革拷锟斤拷位锟借定为锟截讹拷值锟斤拷通锟斤拷使锟斤拷锟斤拷锟铰的筹拷式锟轿ｏ拷

rect.left 		= xLeft ;
rect.top  		= xTop ;
rect.right 		= xRight ;
rect.bottom		= xBottom ;

锟斤拷锟角ｏ拷通锟斤拷锟斤拷锟斤拷SetRect锟斤拷式锟斤拷只锟斤拷要一锟斤拷锟斤拷锟斤拷锟酵匡拷锟皆得碉拷同锟斤拷锟侥斤拷锟斤拷锟�

SetRect (&rect, xLeft, yTop, xRight, yBottom) ;

锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之一时锟斤拷锟斤拷锟皆很凤拷锟斤拷锟窖★拷锟斤拷锟斤拷锟�8锟斤拷锟斤拷式锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷x锟斤拷锟統锟斤拷锟狡讹拷锟斤拷锟斤拷锟斤拷元锟斤拷
锟斤拷
OffsetRect (&rect, x, y) ;
锟斤拷锟斤拷锟斤拷锟轿的尺寸：
锟斤拷
InflateRect (&rect, x, y) ;
锟斤拷锟轿革拷锟斤拷位锟借定为0锟斤拷
锟斤拷
SetRectEmpty (&rect) ;
锟斤拷锟斤拷锟轿革拷锟狡革拷锟斤拷一锟斤拷锟斤拷锟轿ｏ拷
锟斤拷
CopyRect (&DestRect, &SrcRect) ;
取锟斤拷锟斤拷锟斤拷锟斤拷锟轿的斤拷锟斤拷锟斤拷
锟斤拷
IntersectRect (&DestRect, &SrcRect1, &SrcRect2) ;
取锟斤拷锟斤拷锟斤拷锟斤拷锟轿碉拷锟斤拷锟斤拷锟斤拷
锟斤拷
UnionRect (&DestRect, &SrcRect1, &SrcRect2) ;
确锟斤拷锟斤拷锟斤拷锟角凤拷为锟秸ｏ拷
锟斤拷
bEmpty = IsRectEmpty (&rect) ;
确锟斤拷锟斤拷锟角凤拷锟节撅拷锟斤拷锟节ｏ拷
锟斤拷
bInRect = PtInRect (&rect, point) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷锟斤拷锟斤拷些锟斤拷式锟斤拷同锟斤拷锟矫的筹拷式锟斤拷芗虻ァ锟斤拷锟斤拷纾拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷CopyRect锟斤拷式锟斤拷锟叫ｏ拷

DestRect = SrcRect ;

锟斤拷锟斤拷锟斤拷锟�
锟斤拷

锟斤拷图锟斤拷系统锟叫ｏ拷锟斤拷锟斤拷么一锟斤拷锟斤拷锟斤拷远锟斤拷锟斤拷锟斤拷执锟叫碉拷锟斤拷趣锟斤拷式锟斤拷锟斤拷锟津单碉拷使锟斤拷锟斤拷锟斤拷拇锟叫★拷锟缴拷驶锟斤拷锟揭幌碉拷芯锟斤拷巍锟斤拷锟斤拷锟斤拷锟斤拷锟絎indows锟叫斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟侥筹拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷乍锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟阶憋拷写锟斤拷锟斤拷希锟斤拷锟斤拷锟斤拷锟斤拷识锟斤拷锟斤拷锟斤拷锟斤拷锟杰简单碉拷锟斤拷WM_PAINT讯息锟斤拷使锟斤拷一锟斤拷while(TRUE)锟斤拷圈锟斤拷锟斤拷然锟斤拷锟斤拷锟杰癸拷执锟叫ｏ拷锟斤拷锟角筹拷式锟斤拷停止锟斤拷锟斤拷锟斤拷讯息锟侥达拷锟斤拷锟斤拷同时锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟街癸拷锟斤拷锟斤拷锟叫★拷锟斤拷锟�

一锟街匡拷锟皆斤拷锟杰的凤拷锟斤拷锟斤拷锟借定一锟斤拷Windows锟斤拷时锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷WM_TIMER讯息锟斤拷锟揭斤拷锟节第帮拷锟斤拷锟斤拷锟斤拷锟桔硷拷时锟斤拷锟斤拷锟斤拷锟斤拷锟矫匡拷锟絎M_TIMER讯息锟斤拷锟斤拷使锟斤拷GetDC取锟斤拷一锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷一锟斤拷锟斤拷锟斤拷木锟斤拷危锟饺伙拷锟斤拷锟絉eleaseDC锟酵凤拷装锟斤拷锟斤拷锟捷★拷锟斤拷锟斤拷锟斤拷锟斤拷锟街斤拷锟斤拷锟剿筹拷式锟斤拷趣锟斤拷锟皆ｏ拷锟斤拷为锟斤拷式锟斤拷锟杰撅拷锟斤拷锟杰匡拷鼗锟斤拷锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟斤拷锟斤拷却锟絎M_TIMER讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟较低呈憋拷拥慕锟斤拷锟斤拷取锟�

锟斤拷Windows锟斤拷一锟斤拷锟叫很多「锟斤拷锟斤拷时锟戒」锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷冢锟斤拷锟斤拷锟窖断拷锟斤拷锟轿拷眨锟絎indows只停锟斤拷一锟斤拷小锟斤拷圈锟叫等达拷锟斤拷锟教伙拷锟竭伙拷锟斤拷锟斤拷锟诫。锟斤拷锟斤拷锟杰凤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟节伙拷每锟斤拷疲锟斤拷锟斤拷凭锟斤拷危锟斤拷锟斤拷锟街伙拷锟斤拷锟窖断拷锟斤拷锟斤拷式锟斤拷讯息锟斤拷锟斤拷之锟斤拷锟斤拷头趴锟斤拷锟斤拷兀锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷式锟斤拷目锟斤拷之一锟斤拷锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷锟叫碉拷一锟斤拷锟斤拷锟接ｏ拷

PeekMessage (&msg, NULL, 0, 0, PM_REMOVE) ;

前锟斤拷锟斤拷母锟斤拷锟斤拷锟斤拷锟揭伙拷锟街革拷锟組SG锟结构锟斤拷指锟疥、一锟斤拷锟接达拷锟斤拷锟脚★拷锟斤拷锟斤拷值指示讯息锟斤拷围锟斤拷锟斤拷GetMessage锟侥诧拷锟斤拷锟斤拷同锟斤拷锟斤拷锟节讹拷锟斤拷锟斤拷锟斤拷锟侥革拷锟斤拷锟斤拷锟借定为NULL锟斤拷0时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷锟截筹拷式锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟揭拷锟窖断拷锟窖断拷锟斤拷锟斤拷锟缴撅拷锟斤拷锟斤拷锟絇eekMessage锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟借定为PM_REMOVE锟斤拷锟斤拷锟斤拷锟斤拷锟较ｏ拷锟缴撅拷锟窖断拷锟斤拷锟矫达拷锟斤拷锟斤拷越锟斤拷锟斤拷锟斤拷锟斤拷锟借定为PM_NOREMOVE锟斤拷锟斤拷锟斤拷锟轿裁碢eek_Message锟角★拷偷锟斤拷锟斤拷锟斤拷锟斤拷锟角★拷取锟矫★拷锟斤拷原锟斤拷锟斤拷使锟矫筹拷式锟斤拷锟皆硷拷锟斤拷式锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷一锟斤拷讯息锟斤拷锟斤拷锟斤拷实锟斤拷删锟斤拷锟斤拷锟斤拷

GetMessage锟斤拷锟斤拷锟斤拷锟狡达拷锟截革拷锟斤拷式锟斤拷直锟斤拷锟接筹拷式锟斤拷讯息锟斤拷锟斤拷锟斤拷取锟斤拷讯息锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷锟斤拷锟斤拷锟教达拷锟截ｏ拷锟斤拷锟斤拷锟斤拷一锟斤拷讯息锟角凤拷锟斤拷帧锟斤拷锟窖断拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟窖断⑹憋拷锟絇eekMessage锟侥达拷锟斤拷值为TRUE锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷锟揭斤拷锟斤拷通锟斤拷锟斤拷式锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷没锟斤拷讯息时锟斤拷PeekMessage锟斤拷锟斤拷FALSE锟斤拷0锟斤拷锟斤拷

锟斤拷使锟斤拷锟斤拷锟角匡拷锟皆革拷写锟斤拷通锟斤拷讯息锟斤拷圈锟斤拷锟斤拷锟角匡拷锟皆斤拷锟斤拷锟斤拷锟斤拷示锟侥伙拷圈锟斤拷

while (GetMessage (&msg, NULL, 0, 0))
{
	TranslateMessage (&msg) ;
	DispatchMessage (&msg) ;
}
return msg.wParam ;

锟芥换为锟斤拷锟斤拷幕锟饺︼拷锟�

while (TRUE)
{
	if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
	{
		if (msg.message == WM_QUIT)
			break ;
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	else
	{
		// 锟斤拷锟侥承╋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谐锟绞�
	}
}
return msg.wParam ;

注锟解，WM_QUIT讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椤ｏ拷锟斤拷锟酵拷锟窖断拷锟饺︼拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫达拷锟斤拷锟斤拷锟轿拷锟斤拷GetMessage锟斤拷锟秸碉拷一锟斤拷WM_QUIT讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷锟斤拷锟侥达拷锟斤拷值锟斤拷指示锟角凤拷玫锟揭伙拷锟窖断拷锟斤拷锟斤拷锟斤拷锟揭拷锟絎M_QUIT锟斤拷锟叫硷拷椤�

锟斤拷锟絇eekMessage锟侥达拷锟斤拷值为TRUE锟斤拷锟斤拷讯息锟斤拷通锟斤拷锟斤拷式锟斤拷锟叫达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街滴狥ALSE锟斤拷锟斤拷锟节斤拷锟斤拷锟狡达拷锟截革拷Windows之前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟姐工锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷危锟斤拷锟�

锟斤拷锟斤拷锟斤拷Windows锟侥硷拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷讯息锟斤拷锟斤拷锟斤拷删锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟斤拷锟解并锟斤拷锟斤拷什么锟斤拷锟剿碉拷锟斤拷锟解。锟较撅拷锟斤拷GetMessage锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷删锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷删锟斤拷WM_PAINT讯息锟斤拷唯一锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷锟绞э拷锟斤拷锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟斤拷ValidateRect锟斤拷ValidateRgn锟斤拷锟斤拷BeginPaint锟斤拷EndPaint锟斤拷锟斤拷锟斤拷伞锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷PeekMessage锟斤拷锟斤拷锟斤拷锟斤拷取锟斤拷WM_PAINT讯息锟结，同平锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷么锟酵诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷示锟侥筹拷式锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷械锟斤拷锟斤拷锟窖断拷锟�

while (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE)) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷删锟斤拷WM_PAINT之锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷WM_PAINT讯息锟斤拷锟斤拷式锟酵伙拷锟斤拷远锟斤拷锟斤拷锟斤拷while锟斤拷圈锟叫★拷锟斤拷

PeekMessage锟斤拷Windows锟斤拷锟斤拷锟节版本锟叫憋拷锟斤拷Windows 98锟斤拷要锟斤拷要锟矫多。锟斤拷锟斤拷锟斤拷为Windows锟斤拷16位元锟芥本使锟矫碉拷锟角凤拷锟斤拷锟斤拷权式锟侥多工锟斤拷锟揭斤拷锟节第讹拷十锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟姐）锟斤拷Windows锟斤拷Terminal锟斤拷式锟节达拷通讯锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟结，使锟斤拷一锟斤拷PeekMessage锟斤拷圈锟斤拷锟斤拷印锟斤拷锟斤拷锟斤拷锟斤拷式使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷锟絎indows锟斤拷印应锟矫筹拷式通锟斤拷锟斤拷锟斤拷使锟斤拷一锟斤拷PeekMessage锟斤拷圈锟斤拷锟斤拷Windows 98锟斤拷锟斤拷权式锟侥多工锟斤拷锟斤拷锟铰ｏ拷锟斤拷式锟斤拷锟皆斤拷锟斤拷锟斤拷锟街达拷锟斤拷锟斤拷锟斤拷锟斤拷墙锟斤拷诙锟绞拷驴锟斤拷锟斤拷锟揭伙拷恪�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷PeekMessage锟斤拷式锟斤拷锟斤拷锟角就匡拷锟皆憋拷写一锟斤拷锟斤拷停锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷蔚某锟绞斤拷锟斤拷锟斤拷RANDRECT锟斤拷锟绞�5-7锟斤拷锟斤拷示锟斤拷

 锟斤拷式5-7  RANDRECT
RANDRECT.C
/*----------------------------------------------------------------------
   RANDRECT.C --	Displays Random Rectangles
  			(c) Charles Petzold, 1998
-----------------------------------------------------------------------*/

#include <windows.h>
#include <stdlib.h>	// for the rand function

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
void DrawRectangle (HWND) ;

int cxClient, cyClient ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
			  PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("RandRect") ;
	HWND		hwnd ;
	MSG		msg ;
	WNDCLASS	wndclass ;
     
	wndclass.style 		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra	= 0 ;
	wndclass.hInstance	= hInstance ;
	wndclass.hIcon		= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;
	if (!RegisterClass (&wndclass))
	{
		MessageBox (NULL, TEXT ("This program requires Windows NT!"),
             			   szAppName, MB_ICONERROR) ;
		return 0 ;
	}
     
	hwnd = CreateWindow (	szAppName, TEXT ("Random Rectangles"),
				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
     
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
     
	while (TRUE)
	{
		if (PeekMessage (&msg, NULL, 0, 0, PM_REMOVE))
		{
			if (msg.message == WM_QUIT)
			   break ;
			TranslateMessage (&msg) ;
			DispatchMessage (&msg) ;
          }
		else
			DrawRectangle (hwnd) ;
	}
	return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
	switch (iMsg)
	{
	case	WM_SIZE:
		cxClient = LOWORD (lParam) ;
		cyClient = HIWORD (lParam) ;
		return 0 ;
          
	case	WM_DESTROY:
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
}
void DrawRectangle (HWND hwnd)
{
	HBRUSH	hBrush ;
	HDC 		hdc ;
	RECT		rect ;
     
	if (cxClient == 0 || cyClient == 0)
		return ;
	SetRect (&rect, rand () % cxClient, rand () % cyClient,
         			rand () % cxClient, rand () % cyClient) ;
	hBrush = CreateSolidBrush (
			RGB (rand () % 256, rand () % 256, rand () % 256)) ;
	hdc = GetDC (hwnd) ;
	FillRect (hdc, &rect, hBrush) ;
	ReleaseDC (hwnd, hdc) ;
	DeleteObject (hBrush) ;
}

锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷诘牡锟斤拷锟斤拷锟街达拷械梅浅锟斤拷欤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭幌碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟斤拷式使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟桔癸拷锟斤拷SetRect锟斤拷FillRect锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷C锟斤拷rand锟斤拷式锟矫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞碉拷幕锟剿拷锟缴拷省锟斤拷医锟斤拷诘诙锟绞拷锟斤拷锟斤拷峁╋拷锟斤拷锟斤拷式锟侥讹拷执锟斤拷锟斤拷锟芥本锟斤拷

锟斤拷锟斤拷锟酵伙拷锟狡硷拷锟斤拷锟斤拷锟斤拷
锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟角讹拷锟斤拷示锟斤拷锟斤拷一锟斤拷锟斤拷围锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿э拷蔷锟斤拷巍锟斤拷锟斤拷锟轿猴拷锟斤拷圆锟斤拷锟斤拷稀锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷於伙拷锟狡和硷拷锟矫ｏ拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟酵匡拷锟斤拷锟矫硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫硷拷锟矫ｏ拷锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟皆伙拷图锟侥凤拷围锟斤拷锟斤拷为锟斤拷示锟斤拷锟斤拷锟揭伙拷锟斤拷郑锟斤拷锟斤拷牖拷省锟斤拷锟剿拷偷锟斤拷锟酵家伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紾DI锟斤拷锟斤拷锟斤拷锟接︼拷煤锟斤拷锟紻eleteObject锟斤拷删锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷Windows锟斤拷锟斤拷一锟斤拷锟矫硷拷锟斤拷锟斤拷锟斤拷拇锟斤拷牛锟斤拷锟教狧RGN锟斤拷锟斤拷虻サ募锟斤拷锟斤拷锟斤拷锟斤拷蔷锟斤拷危锟斤拷锟斤拷锟斤拷纸锟斤拷锟斤拷锟斤拷蔚姆锟斤拷锟斤拷锟�

hRgn = CreateRectRgn (xLeft, yTop, xRight, yBottom) ;

锟斤拷锟斤拷

hRgn = CreateRectRgnIndirect (&rect) ;

锟斤拷也锟斤拷锟皆斤拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷

hRgn = CreateEllipticRgn (xLeft, yTop, xRight, yBottom) ;

锟斤拷锟斤拷

hRgn = CreateEllipticRgnIndirect (&rect) ;

CreateRoundRectRgn锟斤拷锟斤拷圆锟角的撅拷锟轿硷拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷渭锟斤拷锟斤拷锟斤拷锟侥猴拷式锟斤拷锟斤拷锟絇olygon锟斤拷式锟斤拷

hRgn = CreatePolygonRgn (&point, iCount, iPolyFillMode) ;

point锟斤拷锟斤拷锟斤拷一锟斤拷POINT锟斤拷态锟侥结构锟斤拷锟叫ｏ拷iCount锟角碉拷锟斤拷锟侥匡拷锟絠PolyFillMode锟斤拷ALTERNATE锟斤拷锟斤拷WINDING锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷CreatePolyPolygonRgn锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿硷拷锟斤拷锟斤拷锟斤拷

锟斤拷么锟斤拷锟斤拷锟斤拷锟绞ｏ拷锟斤拷锟斤拷锟斤拷锟津究撅拷锟斤拷什么锟截憋拷之锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷思锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷

iRgnType = CombineRgn (hDestRgn, hSrcRgn1, hSrcRgn2, iCombine) ;

锟斤拷一锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷hSrcRgn1锟斤拷hSrcRgn2锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷么锟斤拷锟絟DestRgn指锟斤拷锟斤拷铣傻募锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟脚讹拷锟斤拷锟斤拷锟斤拷锟斤拷效锟侥ｏ拷锟斤拷锟斤拷hDestRgn原锟斤拷锟斤拷指锟斤拷募锟斤拷锟斤拷锟斤拷锟斤拷苹锟斤拷锟斤拷耍锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷式时锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷hDestRgn锟节筹拷始时指锟斤拷一锟斤拷小锟侥撅拷锟轿硷拷锟斤拷锟斤拷锟津）★拷

iCombine锟斤拷锟斤拷说锟斤拷hSrcRgn1锟斤拷hSrcRgn2锟斤拷锟斤拷锟较ｏ拷锟斤拷锟斤拷5-9锟斤拷

锟斤拷5-9

iCombine值	锟铰硷拷锟斤拷锟斤拷锟斤拷
RGN_AND	锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷墓锟斤拷锟斤拷锟斤拷锟�
RGN_OR	锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺拷锟�
RGN_XOR	锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺拷锟斤拷锟饺ワ拷锟斤拷锟斤拷锟斤拷锟�
RGN_DIFF	hSrcRgn1锟斤拷锟斤拷hSrcRgn2锟叫的诧拷锟斤拷
RGN_COPY	hSrcRgn1锟斤拷全锟斤拷锟斤拷锟斤拷锟斤拷hSrcRgn2锟斤拷

锟斤拷CombineRgn锟斤拷锟截碉拷iRgnType值锟斤拷锟斤拷锟斤拷之一锟斤拷NULLREGION锟斤拷锟斤拷示锟矫碉拷一锟斤拷锟秸硷拷锟斤拷锟斤拷锟斤拷SIMPLEREGION锟斤拷锟斤拷示锟矫碉拷一锟斤拷锟津单的撅拷锟轿★拷锟斤拷圆锟斤拷锟竭讹拷锟斤拷危锟紺OMPLEXREGION锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷巍锟斤拷锟皆诧拷锟斤拷锟斤拷蔚锟斤拷锟较ｏ拷ERROR锟斤拷锟斤拷示锟斤拷锟斤拷锟剿★拷

锟斤拷锟斤拷锟斤拷锟斤拷拇锟斤拷趴锟斤拷锟斤拷锟斤拷锟侥革拷锟斤拷图锟斤拷式锟斤拷

FillRgn (hdc, hRgn, hBrush) ;
FrameRgn (hdc, hRgn, hBrush, xFrame, yFrame) ;
InvertRgn (hdc, hRgn) ;
PaintRgn (hdc, hRgn) ;

FillRgn锟斤拷FrameRgn锟斤拷InvertRgn锟斤拷锟斤拷锟紽illRect锟斤拷FrameRect锟斤拷InvertRect锟斤拷FrameRgn锟斤拷xFrame锟斤拷yFrame锟斤拷锟斤拷锟角伙拷锟斤拷锟斤拷锟斤拷锟斤拷围锟侥边匡拷目锟斤拷群透叨取锟絇aintRgn锟斤拷式锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷目前锟斤拷刷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷式锟斤拷锟劫讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟竭硷拷锟斤拷锟疥定锟斤拷摹锟�

锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟结，锟斤拷锟斤拷锟斤拷删锟斤拷锟斤拷锟斤拷GDI锟斤拷锟斤拷锟斤拷锟缴撅拷锟斤拷锟斤拷锟�

DeleteObject (hRgn) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷募锟斤拷锟�
锟斤拷

锟斤拷锟斤拷也锟节硷拷锟斤拷锟叫帮拷锟斤拷锟斤拷一锟斤拷锟斤拷色锟斤拷InvalidateRect锟斤拷式使锟斤拷示锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷失效锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟界，锟斤拷锟斤拷锟斤拷使锟斤拷InvalidateRect锟斤拷式锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷虿⒉锟斤拷锟揭伙拷锟絎M_PAINT讯息锟斤拷

InvalidateRect (hwnd, NULL, TRUE) ;

锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷GetUpdateRect锟斤拷取锟斤拷失效锟斤拷锟轿碉拷锟斤拷锟疥，锟斤拷锟揭匡拷锟斤拷使锟斤拷ValidateRect锟斤拷式使锟斤拷示锟斤拷锟斤拷木锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟斤拷盏锟揭伙拷锟絎M_PAINT讯息时锟斤拷锟斤拷效锟斤拷锟轿碉拷锟斤拷锟斤拷锟斤拷源锟絇AINTSTRUCT锟结构锟叫得碉拷锟斤拷锟矫结构锟斤拷锟斤拷BeginPaint锟斤拷式锟斤拷锟斤拷摹锟斤拷锟斤拷锟斤拷效锟斤拷锟轿伙拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟津」ｏ拷锟斤拷锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟酵硷拷锟�

Windows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷於硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷蔷锟斤拷蔚暮锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷InvalidateRect锟斤拷ValidateRect锟斤拷

InvalidateRgn (hwnd, hRgn, bErase) ;

锟斤拷

ValidateRgn (hwnd, hRgn) ;

锟斤拷锟斤拷锟斤拷锟秸碉拷一锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷锟斤拷锟斤拷锟絎M_PAINT讯息时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟角撅拷锟轿★拷

锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式之一锟斤拷

SelectObject (hdc, hRgn) ;

锟斤拷

SelectClipRgn (hdc, hRgn) ;

通锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟侥硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟阶帮拷锟斤拷锟斤拷辍�

GDI为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟捷革拷锟斤拷锟斤拷锟斤拷锟斤拷锟节斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟斤拷之锟结，使锟斤拷锟竭匡拷锟斤拷删锟斤拷锟斤拷锟斤拷Windows锟斤拷锟结供锟剿硷拷锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷锟斤拷胁锟斤拷锟斤拷暮锟绞斤拷锟斤拷锟紼xcludeClipRect锟斤拷於斤拷一锟斤拷锟斤拷锟轿从硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟脚筹拷锟斤拷锟斤拷IntersectClipRect锟斤拷於斤拷锟斤拷一锟斤拷锟铰的硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷前一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟轿的斤拷锟斤拷OffsetClipRgn锟斤拷於斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷帧锟�

CLOVER锟斤拷式
锟斤拷

CLOVER锟斤拷式锟斤拷锟侥革拷锟斤拷圆锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷颍锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷装锟斤拷锟斤拷锟斤拷锟叫ｏ拷然锟结画锟斤拷锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷某锟斤拷锟斤拷锟揭幌碉拷锟街憋拷撸锟斤拷锟叫┲憋拷锟街伙拷锟斤拷锟斤拷诩锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷薅锟斤拷姆锟轿э拷锟斤拷锟斤拷锟斤拷示锟斤拷图5-20锟斤拷示锟斤拷

锟斤拷

图5-20 CLOVER锟斤拷锟矫革拷锟接的硷拷锟斤拷锟斤拷锟津画筹拷锟斤拷图锟斤拷

要锟矫筹拷锟斤拷姆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷图锟轿ｏ拷锟酵憋拷锟斤拷锟斤拷锟斤拷锟皆诧拷谋锟斤拷吖锟绞斤拷锟斤拷锟斤拷每锟斤拷直锟竭的端点。锟斤拷锟矫革拷锟接的硷拷锟斤拷锟斤拷锟津，匡拷锟斤拷直锟接伙拷锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Windows确锟斤拷锟斤拷说恪LOVER锟斤拷锟绞�5-8锟斤拷示锟斤拷

 锟斤拷式5-8  CLOVER
CLOVER.C
/*--------------------------------------------------------------------------
	CLOVER.C --	Clover Drawing Program Using Regions
			(c) Charles Petzold, 1998
----------------------------------------------------------------------*/
#include <windows.h>
#include <math.h>

#define TWO_PI (2.0 * 3.14159)
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
			  PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName[] = TEXT ("Clover") ;
	HWND		hwnd ;
	MSG 		msg ;
	WNDCLASS	wndclass ;
     
	wndclass.style		= CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc= WndProc ;
	wndclass.cbClsExtra	= 0 ;
	wndclass.cbWndExtra	= 0 ;
	wndclass.hInstance	= hInstance ;
	wndclass.hIcon		= LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor	= LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground	= (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName	= NULL ;
	wndclass.lpszClassName	= szAppName ;
     
	if (!RegisterClass (&wndclass))
	{
		MessageBox (NULL, TEXT ("This program requires Windows NT!"),
			   szAppName, MB_ICONERROR) ;
		return 0 ;
	}
     
	hwnd = CreateWindow (szAppName, TEXT ("Draw a Clover"),
				WS_OVERLAPPEDWINDOW,
				CW_USEDEFAULT, CW_USEDEFAULT,
				CW_USEDEFAULT, CW_USEDEFAULT,
				NULL, NULL, hInstance, NULL) ;
	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;
     
	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
	static HRGN hRgnClip ;
	static int	cxClient, cyClient ;
	double	fAngle, fRadius ;
	HCURSOR	hCursor ;
	HDC 		hdc ;
	HRGN 		hRgnTemp[6] ;
	int		i ;
	PAINTSTRUCT ps ;
	switch (iMsg)
	{
	case	WM_SIZE:
		cxClient	= LOWORD (lParam) ;
		cyClient	= HIWORD (lParam) ;
		hCursor	= SetCursor (LoadCursor (NULL, IDC_WAIT)) ;
		ShowCursor (TRUE) ;
          
		if (hRgnClip)
			DeleteObject (hRgnClip) ;
          
		hRgnTemp[0]	= CreateEllipticRgn (0, cyClient / 3,
						cxClient / 2, 2 * cyClient / 3) ;
		hRgnTemp[1]	= CreateEllipticRgn (cxClient / 2, cyClient / 3,
						cxClient, 2 * cyClient / 3) ;
		hRgnTemp[2]	= CreateEllipticRgn (cxClient / 3, 0,
						2 * cxClient / 3, cyClient / 2) ;
		hRgnTemp[3]	= CreateEllipticRgn (cxClient / 3, cyClient / 2,
2 * cxClient / 3, cyClient) ;
		hRgnTemp[4]	= CreateRectRgn (0, 0, 1, 1) ;
		hRgnTemp[5]	= CreateRectRgn (0, 0, 1, 1) ;
		hRgnClip	= CreateRectRgn (0, 0, 1, 1) ;

		CombineRgn (hRgnTemp[4], hRgnTemp[0], hRgnTemp[1], RGN_OR) ;
		CombineRgn (hRgnTemp[5], hRgnTemp[2], hRgnTemp[3], RGN_OR) ;
		CombineRgn (hRgnClip,    hRgnTemp[4], hRgnTemp[5], RGN_XOR) ;
          
		for (i = 0 ; i < 6 ; i++)
			DeleteObject (hRgnTemp[i]) ;
          
		SetCursor (hCursor) ;
		ShowCursor (FALSE) ;
		return 0 ;
          
	case	WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;
          
		SetViewportOrgEx (hdc, cxClient / 2, cyClient / 2, NULL) ;
          SelectClipRgn (hdc, hRgnClip) ;
		fRadius = _hypot (cxClient / 2.0, cyClient / 2.0) ;
		for (fAngle = 0.0 ; fAngle < TWO_PI ; fAngle += TWO_PI / 360)
		{
			MoveToEx (hdc, 0, 0, NULL) ;
			LineTo (hdc,	(int) ( fRadius * cos (fAngle) + 0.5),
				(int) (-fRadius * sin (fAngle) + 0.5)) ;
		}
		EndPaint (hwnd, &ps) ;
		return 0 ;
	case WM_DESTROY:
		DeleteObject (hRgnClip) ;
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, iMsg, wParam, lParam) ;
}

锟斤拷

锟斤拷於硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷装锟斤拷锟斤拷锟疥，CLOVER锟斤拷式锟斤拷锟斤拷锟斤拷每锟轿斤拷锟秸碉拷WM_SIZE讯息时锟斤拷锟铰斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟津。硷拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷印锟斤拷锟斤拷诘目锟斤拷倩锟斤拷锟斤拷锟揭凰诧拷锟酵匡拷锟皆伙拷锟斤拷锟斤拷锟斤拷

CLOVER锟接斤拷锟斤拷锟侥革拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷始锟斤拷锟斤拷锟侥革拷锟斤拷圆锟斤拷锟斤拷锟絟RgnTemp锟斤拷锟叫碉拷头锟侥革拷元锟斤拷锟叫ｏ拷然锟结建锟斤拷锟斤拷锟斤拷锟斤拷锟秸★拷锟斤拷锟斤拷锟斤拷锟斤拷

hRgnTemp [4]	= CreateRectRgn (0, 0, 1, 1) ;
hRgnTemp [5]	= CreateRectRgn (0, 0, 1, 1) ;
hRgnClip   	    = CreateRectRgn (0, 0, 1, 1) ;

锟斤拷示锟斤拷锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

CombineRgn (hRgnTemp [4], hRgnTemp [0], hRgnTemp [1], RGN_OR) ;

同锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

CombineRgn (hRgnTemp [5], hRgnTemp [2], hRgnTemp [3], RGN_OR) ;

锟斤拷锟结，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷系锟絟RgnClip锟叫ｏ拷

CombineRgn (hRgnClip, hRgnTemp [4], hRgnTemp [5], RGN_XOR) ;

RGN_XOR识锟斤拷锟斤拷锟斤拷於从斤拷锟斤拷锟斤拷锟斤拷锟斤拷懦锟斤拷氐锟斤拷锟斤拷帧锟斤拷锟斤拷幔撅拷锟�6锟斤拷锟斤拷时锟斤拷锟斤拷

for (i = 0 ; i < 6 ; i++)
	DeleteObject (hRgnTemp [i]) ;

锟诫画锟斤拷锟斤拷图锟轿憋拷锟斤拷锟斤拷锟斤拷WM_PAINT锟侥达拷锟斤拷锟杰简单★拷锟接诧拷原锟斤拷锟借定为锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷模锟绞癸拷锟街憋拷吒锟斤拷锟斤拷锟揭恍╋拷锟斤拷锟斤拷锟絎M_SIZE讯息锟斤拷锟斤拷锟节间建锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷为装锟斤拷锟斤拷锟捷的硷拷锟斤拷锟斤拷锟斤拷

SetViewportOrg (hdc, xClient / 2, yClient / 2) ;
SelectClipRgn (hdc, hRgnClip) ;

锟斤拷锟节ｏ拷剩锟铰的撅拷锟角伙拷直锟斤拷锟剿ｏ拷锟斤拷360锟斤拷锟斤拷每锟斤拷一锟饺伙拷一锟斤拷锟斤拷每锟斤拷锟竭的筹拷锟斤拷为锟斤拷锟斤拷fRadius锟斤拷锟斤拷锟角达拷锟斤拷锟侥碉拷锟斤拷示锟斤拷锟斤拷慕锟斤拷锟侥撅拷锟诫：

fRadius = hypot (xClient / 2.0, yClient / 2.0) ;
for (fAngle = 0.0 ; fAngle < TWO_PI ; fAngle += TWO_PI / 360)
{
	MoveToEx (hdc, 0, 0, NULL) ;
	LineTo (hdc, 	(int) ( fRadius * cos (fAngle) + 0.5),
			(int) (-fRadius * sin (fAngle) + 0.5)) ;
}

锟节达拷锟斤拷WM_DESTROY讯息时锟斤拷删锟斤拷锟矫硷拷锟斤拷锟斤拷锟斤拷

DeleteObject (hRgnClip) ;

锟解不锟角憋拷锟斤拷锟斤拷图锟轿筹拷式锟斤拷频锟斤拷锟斤拷锟斤拷锟斤拷莸锟绞拷锟斤拷锟斤拷锟斤拷锟斤拷锟接★拷锟斤拷锟绞拷锟斤拷潞锟绞拷锟斤拷锟斤拷锟斤拷鄣锟斤拷锟酵�,锟斤拷十锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街猴拷锟斤拷锟藉，锟斤拷十锟斤拷锟斤拷锟斤拷锟斤拷metafile锟斤拷