锟斤拷锟斤拷 | Programming Windows锟斤拷式锟斤拷锟斤拷锟斤拷锟街革拷锟� http:///nrdoc.com/res/wd/

7. 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侥讹拷位锟借备锟斤拷锟斤拷然也锟斤拷锟斤拷使锟斤拷锟斤拷锟界触锟斤拷锟斤拷锟斤拷凸锟斤拷之锟斤拷锟斤拷锟斤拷锟斤拷璞革拷锟斤拷锟斤拷锟街伙拷谢锟斤拷锟斤拷约锟斤拷锟斤拷锟斤拷锟较ワ拷锟斤拷偷锟斤拷锟斤拷系墓旒ｏ拷锟饺诧拷锟斤拷锟斤拷透锟斤拷PC锟叫筹拷锟斤拷唯一锟斤拷锟斤拷锟借备锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟斤拷然锟斤拷Windows锟斤拷锟斤拷锟节匡拷锟斤拷锟斤拷员锟斤拷为锟斤拷锟角诧拷应锟斤拷要锟斤拷使锟斤拷锟斤拷为锟斤拷执锟斤拷锟斤拷锟狡凤拷锟斤拷锟斤拷锟斤拷锟街伙拷锟斤拷锟斤拷锟剿ｏ拷锟斤拷锟角斤拷锟斤拷锟斤拷锟斤拷为一锟斤拷选锟斤拷锟皆的革拷锟斤拷锟借备锟斤拷锟斤拷为Windows锟叫碉拷锟斤拷锟叫诧拷锟斤拷锟皆硷拷applet锟结供一锟街硷拷锟教斤拷锟芥（锟斤拷锟界，锟介看Windows小锟斤拷锟教筹拷式锟斤拷锟斤拷锟斤拷说锟斤拷锟斤拷讯锟斤拷锟斤拷锟皆匡拷锟斤拷每锟斤拷锟斤拷钮锟斤拷锟结供锟斤拷一锟斤拷同锟饺癸拷效锟侥硷拷锟教诧拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟藉发展锟斤拷员使锟矫硷拷锟教斤拷锟斤拷锟斤拷锟结供锟诫滑锟斤拷锟斤拷锟斤拷锟酵拷墓锟斤拷埽锟斤拷獗撅拷锟斤拷锟角帮拷陌姹疽诧拷锟斤拷锟矫达拷锟斤拷摹锟�

锟斤拷锟斤拷锟斤拷锟斤拷说锟斤拷锟斤拷锟节碉拷Windows锟斤拷要锟斤拷锟斤拷锟斤拷锟劫ｏ拷一些讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥★拷锟斤拷然锟斤拷锟斤拷也锟斤拷锟皆帮拷锟铰伙拷锟襟，讹拷锟斤拷Windows锟斤拷然锟斤拷锟斤拷执锟斤拷锟斤拷锟矫ｏ拷只锟斤拷讯息锟斤拷锟斤拷锟斤拷锟绞撅拷锟矫伙拷锟斤拷锟斤拷踊锟斤拷螅锟斤拷锟酵硷拷锟斤拷没锟斤拷锟斤拷锟绞癸拷锟絎indows锟斤拷锟斤拷锟矫斤拷趾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揭伙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饺伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟剿ｏ拷锟揭伙拷锟斤拷喜锟斤拷为锟斤拷锟斤拷锟斤拷锟结供锟斤拷锟教诧拷锟斤拷锟斤拷锟斤拷锟斤拷员锟斤拷锟斤拷喜锟斤拷锟斤拷锟斤拷锟角碉拷锟街憋拷锟斤拷锟节硷拷锟斤拷锟较ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷为每锟斤拷锟剿讹拷锟斤拷锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟襟，伙拷锟竭伙拷锟斤拷锟狡讹拷锟斤拷锟斤拷锟斤拷锟侥撅拷锟介。使锟矫硷拷锟斤拷通锟斤拷锟斤拷锟斤拷要锟斤拷锟窖革拷锟斤拷木锟斤拷锟斤拷锟脚拷锟斤拷锟斤拷锟斤拷锟轿诧拷锟绞癸拷眉锟斤拷痰锟斤拷锟斤拷峁╋拷锟斤拷锟侥癸拷锟杰★拷

锟斤拷锟斤拷通锟斤拷锟斤拷为锟斤拷锟斤拷锟教憋拷锟斤拷锟斤拷锟酵诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟较ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟届痘锟酵硷拷筒锟斤拷锟酵硷拷锟斤拷锟斤拷锟斤拷实锟斤拷锟较ｏ拷锟斤拷锟铰达拷锟斤拷锟斤拷姆锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟揭恍┩硷拷危锟斤拷锟斤拷锟斤拷玫锟斤拷锟斤拷锟斤拷锟斤拷诘锟斤拷锟斤拷锟斤拷锟窖э拷锟斤拷锟街讹拷锟�

锟斤拷锟斤拷锟斤拷锟�
锟斤拷

Windows 98锟斤拷支援锟斤拷锟斤拷锟斤拷双锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷使锟斤拷摇锟剿伙拷锟竭癸拷锟斤拷锟侥ｏ拷獾ワ拷锟斤拷锟斤拷锟斤拷锟斤拷冢锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟竭讹拷锟叫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Windows应锟矫筹拷式锟斤拷锟角憋拷锟斤拷使锟斤拷双锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟襟。诧拷锟斤拷锟斤拷锟斤拷锟剿拷锟斤拷锟斤拷锟斤拷丫锟斤拷锟轿拷锟绞碉拷系谋锟阶硷拷锟斤拷锟剿诧拷使锟矫第讹拷锟斤拷锟斤拷锟侥达拷统锟窖撅拷锟斤拷锟劫猴拷锟斤拷锟剿★拷锟斤拷然锟斤拷锟节讹拷锟斤拷锟斤拷锟襟按硷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怨锟斤拷鼙锟斤拷锟斤拷锟斤拷嗉达拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷鼙锟斤拷锟街拷锟斤拷锟接达拷锟叫癸拷锟杰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曳锟斤拷锟斤拷锟斤拷锟斤拷曳锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷越锟斤拷停锟斤拷锟饺伙拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟剿拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟较ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟角碉拷锟斤拷锟斤拷锟斤拷GetSystemMetrics锟斤拷式锟斤拷确锟较伙拷锟斤拷锟角凤拷锟斤拷冢锟�

fMouse = GetSystemMetrics (SM_MOUSEPRESENT) ;

锟斤拷锟斤拷丫锟斤拷锟阶帮拷嘶锟斤拷锟絝Mouse锟斤拷锟斤拷锟斤拷TRUE锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷锟矫伙拷邪锟阶帮拷锟斤拷虼锟�0锟斤拷然锟斤拷锟斤拷锟斤拷Windows 98锟叫ｏ拷锟斤拷锟桔伙拷锟斤拷锟角凤拷装锟斤拷锟剿猴拷式锟斤拷锟斤拷锟斤拷锟斤拷TRUE 锟斤拷锟斤拷Microsoft Windows NT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

要确锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟较帮拷锟斤拷锟侥革拷锟斤拷锟斤拷锟斤拷使锟斤拷

cButtons = GetSystemMetrics (SM_CMOUSEBUTTONS) ;

锟斤拷锟矫伙拷邪锟阶帮拷锟斤拷锟斤拷锟矫达拷锟绞斤拷锟斤拷锟斤拷锟�0锟斤拷然锟斤拷锟斤拷锟斤拷Windows 98锟铰ｏ拷锟斤拷锟矫伙拷邪锟阶帮拷锟斤拷螅撕锟绞斤拷锟斤拷锟斤拷锟�2锟斤拷

习锟斤拷锟斤拷锟斤拷锟街碉拷使锟斤拷锟竭匡拷锟斤拷使锟斤拷Windows锟侥★拷锟斤拷锟斤拷台锟斤拷锟斤拷锟叫伙拷锟斤拷锟襟按硷拷锟斤拷锟斤拷然应锟矫筹拷式锟斤拷锟斤拷通锟斤拷锟斤拷GetSystemMetrics锟斤拷使锟斤拷SM_SWAPBUTTON锟斤拷锟斤拷锟斤拷确锟斤拷锟角凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谢锟斤拷锟斤拷锟酵拷锟矫伙拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷食指锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟绞碉拷锟斤拷锟轿混痘锟斤拷锟斤拷锟揭边★拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷训锟斤拷锟斤拷式锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟较伙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拢锟斤拷锟斤拷锟斤拷锟斤拷锟街拷锟斤拷锟斤拷蟀醇锟斤拷欠锟斤拷谢锟斤拷锟斤拷恕锟�

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锟借定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剿拷锟斤拷俣取锟斤拷锟絎indows应锟矫筹拷式锟斤拷通锟斤拷使锟斤拷SystemParametersInfo锟斤拷式锟斤拷锟斤拷锟借定锟斤拷锟矫达拷锟斤拷锟斤拷讯锟斤拷

一些锟津单的讹拷锟斤拷
锟斤拷

锟斤拷Windows使锟斤拷锟斤拷锟狡讹拷锟斤拷锟斤拷时锟斤拷Windows锟斤拷锟斤拷示锟斤拷锟斤拷锟狡讹拷一锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷锟轿标」锟斤拷小锟斤拷锟斤拷图锟斤拷锟斤拷锟斤拷锟轿憋拷锟斤拷一锟斤拷指锟斤拷锟斤拷示锟斤拷锟较撅拷确位锟矫的碉拷图锟截★拷锟饺点」锟斤拷锟斤拷锟斤拷锟结到锟斤拷锟斤拷锟轿憋拷锟斤拷萤幕锟较碉拷位锟斤拷时锟斤拷指锟斤拷锟斤拷锟饺碉拷锟轿伙拷谩锟�

Windows支援锟斤拷锟斤拷预锟饺讹拷锟斤拷幕锟斤拷锟斤拷伪辏拷锟绞斤拷锟斤拷锟绞癸拷锟斤拷锟叫╋拷伪辍ｏ拷畛ｏ拷锟斤拷锟斤拷浅锟轿狪DC_ARROW锟斤拷斜锟斤拷头锟斤拷锟斤拷WINUSER.H锟叫讹拷锟藉）锟斤拷锟饺碉拷锟节硷拷头锟侥讹拷锟剿★拷IDC_CROSS锟轿标（锟节憋拷锟斤拷锟斤拷锟斤拷锟紹LOKOUT锟斤拷式锟斤拷锟斤拷锟矫碉拷锟斤拷锟斤拷锟饺碉拷锟斤拷十锟街斤拷锟斤拷锟竭碉拷锟斤拷锟侥★拷 IDC_WAIT锟轿憋拷锟斤拷一锟斤拷沙漏锟斤拷通锟斤拷锟斤拷锟街甘撅拷锟绞斤拷锟斤拷锟街达拷小锟斤拷锟绞叫达拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟轿标。锟斤拷锟角斤拷锟节碉拷十锟斤拷学习锟斤拷品锟斤拷锟斤拷锟斤拷诙锟斤拷锟斤拷哟锟斤拷锟斤拷峁故敝革拷锟斤拷囟锟斤拷哟锟斤拷锟斤拷诙锟斤拷伪辏拷锟斤拷纾�

wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;

锟斤拷锟斤拷锟斤拷一些锟斤拷锟斤拷锟斤拷锟襟按硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤：

Clicking 锟斤拷锟铰诧拷锟脚匡拷一锟斤拷锟斤拷锟襟按硷拷锟斤拷
锟斤拷
Double-clicking 锟斤拷锟劫帮拷锟铰诧拷锟脚匡拷锟斤拷锟襟按硷拷锟斤拷锟轿★拷
锟斤拷
Dragging 锟斤拷住锟斤拷锟襟按硷拷锟斤拷锟狡讹拷锟斤拷锟斤拷
锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷锟街憋拷锟轿拷锟斤拷锟斤拷锟叫硷拷锟斤拷锟揭硷拷锟斤拷锟斤拷Windows锟斤拷头锟斤拷锟斤拷锟叫讹拷锟斤拷锟斤拷牖拷锟斤拷泄氐锟绞讹拷锟斤拷锟绞癸拷锟斤拷锟叫碙BUTTON锟斤拷MBUTTON锟斤拷RBUTTON锟斤拷双锟斤拷锟斤拷锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷壹锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街伙拷锟揭伙拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷(Mouse)锟侥革拷锟斤拷
锟斤拷

锟斤拷锟节ｏ拷为锟斤拷展锟斤拷锟揭碉拷锟斤拷锟斤拷锟斤拷锟揭斤拷锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷驯锟斤拷锟斤拷锟桔伙拷锟解：什么锟角★拷mouse锟斤拷锟侥革拷锟斤拷锟斤拷锟斤拷然每锟斤拷锟剿讹拷知锟斤拷锟斤拷只锟斤拷锟捷讹拷锟斤拷锟轿猰ice锟斤拷锟狡猴拷没锟斤拷锟剿对革拷锟斤拷纬坪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拇鸢浮锟斤拷锟斤拷堋锟絤ice锟斤拷锟斤拷mouse锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆撅拷锟斤拷锟揭惯筹拷锟轿匡拷锟侥★拷American Heritage Dictionary of the English Language锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷只锟斤拷未锟结。

锟斤拷Wired style锟斤拷Principles of English Usage in the Digital Age锟斤拷锟斤拷HardWired, 1996锟斤拷指锟斤拷锟斤拷mouse锟斤拷锟饺较好ｏ拷锟皆憋拷锟斤拷锟斤拷锟斤拷锟捷讹拷锟斤拷锟届。锟斤拷1964锟斤拷锟斤拷锟斤拷锟斤拷锟紻oug Engelbart锟皆达拷锟斤拷锟斤拷也锟斤不锟斤拷忙锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷mouse锟侥革拷锟斤拷锟斤拷什么锟斤拷锟斤拷说锟揭诧拷知锟斤拷锟斤拷

锟斤拷锟结，锟斤拷权锟斤拷锟斤拷Microsoft Manual of Style for Technical Publications锟斤拷锟斤拷锟斤拷锟角★拷锟斤拷锟斤拷使锟矫革拷锟斤拷mice锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷岬斤拷锟街籱ouse锟斤拷使锟斤拷mouse devices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接憋拷锟斤拷锟解，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皆撅拷时锟斤拷锟斤拷确实锟角革拷锟斤拷锟角碉拷锟揭革拷锟剿★拷锟斤拷实锟较ｏ拷锟襟部凤拷锟斤拷要mouse锟斤拷锟斤拷锟侥撅拷锟接讹拷锟斤拷锟斤拷锟斤拷锟睫革拷锟斤拷锟杰匡拷锟斤拷锟斤拷锟界，锟斤拷锟斤拷说"People use the almost as much as keyboard"锟斤拷锟斤拷锟斤拷锟斤拷"Pople use mice almost as much as keyboards"锟斤拷

锟斤拷示锟斤拷锟斤拷锟斤拷讯息
锟斤拷

锟斤拷前一锟斤拷锟斤拷锟斤拷锟窖撅拷锟斤拷锟斤拷锟斤拷Windows只锟窖硷拷锟斤拷讯息锟斤拷锟酵革拷拥锟斤拷锟斤拷锟诫焦锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟窖断拷锟剿诧拷同锟斤拷只要锟斤拷锟斤拷锟皆斤拷哟锟斤拷锟斤拷锟斤拷锟侥筹拷哟锟斤拷邪锟斤拷禄锟斤拷蟀醇锟斤拷锟斤拷锟矫达拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷突锟斤拷盏锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷锟斤拷芨锟斤拷哟锟斤拷欠锟筋动锟斤拷锟斤拷锟角凤拷拥锟斤拷锟斤拷锟诫焦锟姐。Windows为锟斤拷锟斤拷锟斤拷锟斤拷21锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷11锟斤拷讯息锟斤拷锟斤拷示锟斤拷锟斤拷锟睫关ｏ拷锟斤拷锟斤拷锟街拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟窖断拷锟斤拷锟絎indows锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷些讯息锟斤拷

锟斤拷锟斤拷锟斤拷锟狡癸拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷时锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟秸碉拷WM_MOUSEMOVE讯息锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫帮拷锟铰伙拷锟斤拷锟酵凤拷一锟斤拷锟斤拷锟襟按硷拷时锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷盏锟斤拷锟斤拷锟斤拷锟叫┭断拷锟�

锟斤拷7-1

锟斤拷	锟斤拷锟斤拷	锟酵凤拷	锟斤拷锟斤拷(双锟斤拷)
锟斤拷	WM_LBUTTONDOWN	WM_LBUTTONUP	WM_LBUTTONDBLCLK
锟斤拷	WM_MBUTTONDOWN	WM_MBUTTONUP	WM_MBUTTONDBLCLK
锟斤拷	WM_RBUTTONDOWN	WM_RBUTTONUP	WM_RBUTTONDBLCLK

只锟叫讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟脚伙拷锟秸碉拷MBUTTON讯息锟斤拷只锟叫讹拷双锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟襟，才伙拷锟斤拷盏锟絉BUTTON讯息锟斤拷只锟叫碉拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟杰斤拷锟斤拷DBLCLK锟斤拷双锟斤拷锟斤拷讯息锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟杰斤拷锟秸碉拷锟斤拷些讯息锟斤拷锟斤拷渭锟斤拷锟斤拷锟斤拷小锟剿拷锟斤拷锟斤拷蟀醇锟斤拷锟揭伙拷冢锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷锟叫┭断拷锟剿碉拷锟斤拷锟絣Param值锟斤拷锟斤拷锟叫伙拷锟斤拷锟轿伙拷茫锟斤拷锟斤拷锟斤拷锟轿獂锟斤拷锟疥，锟斤拷锟斤拷锟斤拷为y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接达拷锟斤拷示锟斤拷锟斤拷锟斤拷锟较角碉拷位锟矫★拷锟斤拷锟斤拷锟斤拷锟斤拷LOWORD锟斤拷HIWORD锟睫硷拷锟斤拷锟斤拷取锟斤拷些值锟斤拷

x = LOWORD (lParam) ;
y = HIWORD (lParam) ;

wParam锟斤拷值指示锟斤拷锟襟按硷拷锟皆硷拷Shift锟斤拷Ctrl锟斤拷锟斤拷状态锟斤拷锟斤拷锟斤拷锟斤拷使锟矫憋拷头锟斤拷锟斤拷WINUSER.H锟叫讹拷锟斤拷锟轿辉拷锟斤拷锟斤拷锟斤拷锟斤拷锟絯Param锟斤拷MK锟斤拷锟阶达拷锟斤拷锟斤拷锟斤拷锟襟按硷拷锟斤拷锟斤拷

MK_LBUTTON	锟斤拷锟斤拷锟斤拷锟�
MK_MBUTTON	锟斤拷锟斤拷锟叫硷拷
MK_RBUTTON	锟斤拷锟斤拷锟揭硷拷
MK_SHIFT	锟斤拷锟斤拷Shift锟斤拷
MK_CONTROL	锟斤拷锟斤拷Ctrl锟斤拷

锟斤拷锟界，锟斤拷锟斤拷盏锟斤拷锟絎M_LBUTTONDOWN讯息锟斤拷锟斤拷锟斤拷值

wparam & MK_SHIFT

锟斤拷TRUE锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷锟斤拷知锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞币诧拷锟斤拷锟斤拷锟絊hift锟斤拷锟斤拷

锟斤拷锟斤拷锟窖伙拷锟斤拷锟狡癸拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷时锟斤拷Windows锟斤拷锟斤拷为锟斤拷锟斤拷锟矫匡拷锟斤拷锟斤拷艿锟酵硷拷锟轿伙拷枚锟斤拷锟斤拷锟揭伙拷锟絎M_MOUSEMOVE讯息锟斤拷锟斤拷锟侥筹拷式锟斤拷锟秸碉拷WM_MOUSEMOVE讯息锟侥达拷锟斤拷锟斤拷锟斤拷锟斤拷於伙拷锟斤拷硬锟藉，锟皆硷拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟节达拷锟斤拷锟斤拷锟斤拷锟狡讹拷讯息时锟斤拷锟劫度★拷锟斤拷锟戒话说锟斤拷Windows锟斤拷锟斤拷锟斤拷未锟斤拷锟斤拷锟斤拷WM_MOUSEMOVE讯息锟斤拷锟斤拷锟斤拷讯息锟斤拷锟叫★拷锟斤拷锟斤拷执锟斤拷锟斤拷锟芥将锟斤拷锟斤拷锟斤拷CONNECT锟斤拷式时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷私锟絎M_MOUSEMOVE讯息锟斤拷锟斤拷锟斤拷锟斤拷锟绞★拷

锟斤拷锟斤拷锟斤拷诜腔疃拷哟锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷邪锟斤拷禄锟斤拷锟斤拷锟斤拷锟斤拷Windows锟斤拷锟窖活动锟接达拷锟斤拷为锟斤拷锟斤拷锟叫帮拷锟铰伙拷锟襟按硷拷锟斤拷锟接达拷锟斤拷然锟斤拷锟絎M_LBUTTONDOWN讯息锟酵碉拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟矫碉拷WM_LBUTTONDOWN讯息时锟斤拷锟斤拷锟侥筹拷式锟酵匡拷锟皆帮拷全锟截假讹拷锟斤拷锟接达拷锟角活动锟斤拷锟斤拷锟剿★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷未锟斤拷锟秸碉拷WM_LBUTTONDOWN讯息锟斤拷锟斤拷锟斤拷锟斤拷冉锟斤拷盏锟斤拷锟絎M_LBUTTONUP锟斤拷讯息锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷哟锟斤拷邪锟斤拷禄锟斤拷蟀醇锟斤拷锟饺伙拷锟斤拷贫锟斤拷锟绞癸拷锟斤拷锟斤拷哟锟斤拷头锟斤拷锟斤拷锟斤拷突锟斤拷锟斤拷锟斤拷锟斤拷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斤拷锟襟按硷拷锟斤拷锟斤拷一锟斤拷锟接达拷锟叫憋拷锟酵凤拷时锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式只锟杰斤拷锟秸碉拷WM_LBUTTONDOWN讯息锟斤拷锟斤拷没锟斤拷锟斤拷应锟斤拷WM_LBUTTONUP讯息锟斤拷

锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟解：

锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟皆★拷锟斤拷锟截伙拷锟襟」诧拷锟斤拷锟斤拷锟斤拷锟截斤拷锟秸伙拷锟斤拷讯息锟斤拷锟斤拷使锟斤拷时锟斤拷锟斤拷锟节革拷锟接达拷锟斤拷示锟斤拷锟斤拷之锟解。锟斤拷锟斤拷锟节憋拷锟铰碉拷锟斤拷锟斤拷学习锟斤拷锟斤拷锟斤拷鼗锟斤拷锟�
锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷锟绞疽伙拷锟较低衬Ｌ断拷锟斤拷锟斤拷锟斤拷系统模态锟皆伙拷锟斤拷锟介，锟斤拷么锟斤拷锟斤拷锟斤拷式锟酵诧拷锟杰斤拷锟秸伙拷锟斤拷讯息锟斤拷锟斤拷系统模态讯息锟斤拷锟斤拷锟斤拷叨曰锟斤拷锟斤拷锟筋动时锟斤拷锟斤拷止锟叫伙拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟竭筹拷式锟斤拷一锟斤拷锟斤拷示系统模态讯息锟斤拷锟斤拷锟斤拷锟斤拷樱锟斤拷堑锟斤拷锟斤拷乇锟絎indows时锟斤拷
锟斤拷

锟津单的伙拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷
锟斤拷

锟斤拷式7-1锟斤拷锟斤拷示锟斤拷CONNECT锟斤拷式锟斤拷锟斤拷一些锟津单的伙拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷锟斤拷突锟斤拷锟窖断拷锟揭恍╋拷锟结。

 锟斤拷式7-1  CONNECT
CONNECT.C
/*--------------------------------------------------------------------------
	CONNECT.C -- Connect-the-Dots Mouse Demo Program
 					(c) Charles Petzold, 1998
---------------------------------------------------------------------------*/

#include <windows.h>
#define MAXPOINTS 1000
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
						PSTR szCmdLine, int iCmdShow)
{
	static TCHAR	szAppName[] = TEXT ("Connect") ;
	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 ("Connect-the-Points Mouse Demo"),
								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 pt[MAXPOINTS] ;
	static int 		iCount ;
	HDC				hdc ;
	in				i, j ;
	PAINTSTRUCT  ps ;
	switch (message)
     {
	case	WM_LBUTTONDOWN:
		iCount = 0 ;
		InvalidateRect (hwnd, NULL, TRUE) ;
		return 0 ;
          
	case	WM_MOUSEMOVE:
		if (wParam & MK_LBUTTON && iCount < 1000)
		{
				pt[iCount  ].x = LOWORD (lParam) ;
				pt[iCount++].y = HIWORD (lParam) ;
               
				hdc = GetDC (hwnd) ;
				SetPixel (hdc, LOWORD (lParam), HIWORD (lParam), 0) ;
				ReleaseDC (hwnd, hdc) ;
		}
          				return 0 ;
          
     	case 	WM_LBUTTONUP:
          		InvalidateRect (hwnd, NULL, FALSE) ;
          		return 0 ;
          
     	case 	WM_PAINT:
          		hdc = BeginPaint (hwnd, &ps) ;
          
          		SetCursor (LoadCursor (NULL, IDC_WAIT)) ;
          		ShowCursor (TRUE) ;
          
          		for (i = 0 ; i < iCount - 1 ; i++)
               				for (j = i + 1 ; j < iCount ; j++)
               				{
                    			MoveToEx (hdc, pt[i].x, pt[i].y, NULL) ;
                    			LineTo   (hdc, pt[j].x, pt[j].y) ;
               }

          		ShowCursor (FALSE) ;
          		SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
          		EndPaint (hwnd, &ps) ;
          		return 0 ;
               
     	case 	WM_DESTROY:
          		PostQuitMessage (0) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

CONNECT锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷讯息锟斤拷

WM_LBUTTONDOWN CONNECT锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟�
锟斤拷
WM_MOUSEMOVE 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷么CONNECT锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫的伙拷锟斤拷位锟矫达拷锟斤拷锟斤拷一锟斤拷锟节点，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷辍�
锟斤拷
WM_LBUTTONUP锟斤拷CONNECT 锟斤拷锟斤拷示锟斤拷锟斤拷锟叫伙拷锟狡的碉拷锟斤拷锟斤拷锟斤拷每锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟揭伙拷锟狡拷锟斤拷锟酵硷拷危锟斤拷锟绞憋拷锟斤拷锟角猴拷鸦鸦锟斤拷一锟斤拷锟姐（锟斤拷图7-1锟斤拷锟斤拷
锟斤拷

锟斤拷

图7-1 CONNECT锟斤拷萤幕锟斤拷示

CONNECT锟斤拷使锟矫凤拷锟斤拷锟斤拷锟窖伙拷锟斤拷锟轿憋拷锟狡讹拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷贫锟揭伙拷锟轿伙拷茫锟斤拷头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的点，CONNECT锟杰达拷锟斤拷锟矫很好ｏ拷锟斤拷锟斤拷锟角帮拷住锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷贫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷涂锟斤拷曰锟斤拷瞥锟斤拷锟斤拷锟斤拷锟酵硷拷锟斤拷锟�

CONNECT使锟斤拷锟斤拷锟斤拷锟斤拷锟津单碉拷图锟斤拷装锟矫斤拷锟斤拷(GDI)锟斤拷式锟斤拷锟斤拷锟节碉拷锟斤拷锟斤拷锟斤拷锟桔癸拷锟斤拷些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绞憋拷锟絊etPixel为每锟斤拷WM_MOUSEMOVE讯息锟斤拷锟斤拷一锟斤拷锟斤拷图锟截ｏ拷锟斤拷於高斤拷锟斤拷锟饺碉拷锟斤拷示锟斤拷锟斤拷图锟截硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷直锟斤拷锟斤拷要MoveToEx锟斤拷LineTo锟斤拷式锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷头呕锟斤拷蟀醇锟街帮拷鸦锟斤拷锟斤拷伪锟斤拷频锟斤拷锟绞撅拷锟斤拷锟街拷猓拷锟矫碈ONNECT锟酵诧拷锟斤拷锟斤拷锟斤拷锟斤拷些锟姐，锟斤拷为锟斤拷没锟斤拷锟秸碉拷WM_LBUTTONUP讯息锟斤拷锟斤拷锟斤拷锟斤拷鸦锟斤拷锟斤拷苹锟斤拷锟绞撅拷锟斤拷锟斤拷诓锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷么CONNECT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斤拷示锟斤拷锟斤拷锟斤拷锟酵凤拷锟斤拷锟斤拷峄癸拷锟斤拷锟斤拷锟斤拷谢锟酵硷拷锟斤拷锟矫达拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷獍达拷禄锟斤拷锟斤拷锟斤拷苹锟斤拷锟绞撅拷锟斤拷锟斤拷小锟�

CONNECT锟斤拷锟斤拷锟皆憋拷锟斤拷1000锟斤拷锟姐。锟斤拷锟斤拷锟轿狿锟斤拷锟斤拷CONNECT锟斤拷锟斤拷锟斤拷锟斤拷锟酵碉拷锟絇锟斤拷 (P - 1) / 2锟斤拷锟斤拷锟斤拷锟�1000锟斤拷锟姐，锟斤拷要锟斤拷锟斤拷50锟斤拷锟斤拷直锟竭ｏ拷锟斤拷约锟斤拷要锟斤拷锟斤拷锟接诧拷锟杰伙拷锟疥（时锟斤拷某锟斤拷锟饺★拷锟斤拷锟斤拷锟斤拷硬锟斤拷锟借备锟斤拷锟斤拷锟斤拷锟絎indows 98锟斤拷一锟斤拷锟斤拷锟斤拷权式锟洁工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锟绞憋拷锟斤拷谢锟斤拷锟斤拷锟侥筹拷式锟叫★拷锟斤拷锟角ｏ拷锟斤拷锟斤拷式锟斤拷锟斤拷忙锟斤拷时锟斤拷锟斤拷锟斤拷锟睫凤拷锟斤拷CONNECT锟斤拷式锟斤拷锟轿猴拷锟铰ｏ拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟斤拷锟斤拷锟脚等ｏ拷锟斤拷锟节第讹拷十锟斤拷锟叫ｏ拷锟斤拷锟角斤拷锟斤拷锟桔斤拷锟斤拷锟揭伙拷锟斤拷锟侥凤拷锟斤拷锟斤拷

锟斤拷为CONNECT锟斤拷锟杰会花一些时锟斤拷锟斤拷锟斤拷锟斤拷直锟竭ｏ拷锟斤拷锟斤拷诖锟斤拷锟絎M_PAINT讯息时锟斤拷锟斤拷锟叫伙拷锟斤拷沙漏锟轿标，然锟斤拷锟劫恢革拷原状锟斤拷锟斤拷要锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿憋拷锟斤拷锟斤拷锟斤拷SetCursor锟斤拷CONNECT锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷ShowCursor锟斤拷一锟斤拷锟斤拷TRUE锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷FALSE锟斤拷锟斤拷锟斤拷锟揭斤拷锟节憋拷锟铰碉拷锟斤拷锟芥，锟斤拷使锟矫硷拷锟斤拷模锟解滑锟斤拷一锟斤拷锟叫革拷锟斤拷细锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟叫★拷

锟斤拷时锟斤拷锟斤拷锟斤拷使锟矫★拷锟斤拷锟劫★拷锟斤拷锟斤拷蚀锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷贫锟斤拷姆锟斤拷锟斤拷锟斤拷锟斤拷牵锟斤拷锟斤拷俨锟斤拷锟斤拷锟轿讹拷锟斤拷锟斤拷锟绞斤拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷械锟侥筹拷锟斤拷锟饺︼拷铮拷锟斤拷细锟斤拷婊拷锟斤拷锟斤拷锟绞撅拷锟斤拷系锟斤拷硕锟斤拷锟绞碉拷锟斤拷希锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟矫匡拷锟斤拷锟斤拷锟窖断拷锟饺伙拷锟窖革拷锟斤拷顺锟斤拷锟�

锟斤拷锟斤拷Shift锟斤拷
锟斤拷

锟斤拷CONNECT锟斤拷锟秸碉拷一锟斤拷WM_MOUSEMOVE讯息时锟斤拷锟斤拷锟斤拷wParam锟斤拷MK_LBUTTON锟斤拷锟斤拷位元锟诫（AND锟斤拷锟斤拷锟姐，锟斤拷确锟斤拷锟角凤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絯Param也锟斤拷锟斤拷锟斤拷锟饺凤拷锟絊hift锟斤拷锟斤拷状态锟斤拷锟斤拷锟界，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Shift锟斤拷Ctrl锟斤拷锟斤拷状态锟斤拷锟斤拷么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凤拷锟斤拷锟斤拷

if (wParam & MK_SHIFT)
{
	if (wParam & MK_CONTROL) 
     	{
		//锟斤拷锟斤拷锟斤拷Shift锟斤拷Ctrl锟斤拷
	}
	else
	{
				//锟斤拷锟斤拷锟斤拷Shift锟斤拷
		}
	{
	else
	{
		if (wParam & MK_CONTROL)
		{
				//锟斤拷锟斤拷锟斤拷Ctrl锟斤拷 
		}
		else
		{
				//Shift锟斤拷Ctrl锟斤拷锟斤拷未锟斤拷锟斤拷
		}
}

锟斤拷锟斤拷锟斤拷锟斤拷诔锟绞斤拷锟酵笔癸拷锟斤拷锟斤拷壹锟斤拷锟酵憋拷锟斤拷锟斤拷锟斤拷希锟斤拷只锟叫碉拷锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟揭诧拷锟绞癸拷锟斤拷锟斤拷某锟绞斤拷锟斤拷锟矫达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫达拷锟斤拷锟绞斤拷锟絊hift锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟矫碉拷效锟斤拷壹锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷锟皆伙拷锟襟按硷拷锟侥达拷锟斤拷锟斤拷锟皆诧拷锟斤拷锟斤拷锟斤拷锟斤拷示锟侥凤拷锟斤拷锟斤拷

case	WM_LBUTTONDOWN:
	if (!(wParam & MK_SHIFT))
	{
				//锟斤拷锟斤拷锟斤拷锟�
				return 0 ;
	}
				// Fall through
case WM_RBUTTONDOWN:
	//锟斤拷锟斤拷锟揭硷拷
	return 0 ;

Windows锟斤拷式GetKeyState锟斤拷锟节碉拷锟斤拷锟斤拷锟叫斤拷锟杰癸拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟絍K_LBUTTON锟斤拷VK_RBUTTON锟斤拷VK_MBUTTON锟斤拷VK_SHIFT锟斤拷VK_CONTROL锟斤拷锟斤拷锟截伙拷锟襟按硷拷锟斤拷Shift锟斤拷锟斤拷状态锟斤拷锟斤拷锟紾etKeyState锟斤拷锟截革拷值锟斤拷锟斤拷说锟斤拷锟窖帮拷锟斤拷锟剿伙拷锟襟按硷拷锟斤拷锟斤拷Shift锟斤拷锟斤拷锟斤拷为GetKeyState锟斤拷锟斤拷目前锟斤拷锟节达拷锟斤拷锟侥伙拷锟襟按硷拷锟斤拷锟斤拷Shift锟斤拷锟斤拷状态锟斤拷锟斤拷锟斤拷全锟斤拷状态锟斤拷讯锟斤拷锟斤拷应锟斤拷讯息锟斤拷锟斤拷同锟斤拷锟侥★拷锟斤拷锟角ｏ拷锟斤拷锟界不锟杰帮拷GetKeyState锟斤拷锟斤拷锟轿达拷锟斤拷碌募锟揭伙拷锟斤拷锟斤拷锟揭诧拷锟斤拷锟轿拷锟轿达拷锟斤拷碌幕锟斤拷蟀醇锟斤拷锟斤拷锟紾etKeyState锟斤拷锟诫不要锟斤拷锟斤拷锟斤拷锟斤拷

while (GetKeyState (VK_LBUTTON) >= 0) ;  // WRONG !!!

只锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GetKeyState锟节间处锟斤拷讯息时锟斤拷锟斤拷锟斤拷锟斤拷丫锟斤拷锟斤拷拢锟斤拷呕岜拷锟斤拷锟窖撅拷锟斤拷锟铰碉拷讯息锟斤拷

双锟斤拷锟斤拷锟襟按硷拷
锟斤拷

双锟斤拷锟斤拷锟襟按硷拷锟斤拷指锟节讹拷时锟斤拷锟节碉拷锟斤拷锟斤拷锟轿★拷要确锟斤拷为双锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿碉拷锟斤拷锟斤拷锟诫发锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷位锟斤拷十锟街接斤拷锟斤拷状锟斤拷锟铰ｏ拷锟节讹拷锟斤拷围锟斤拷一锟斤拷平锟斤拷系统锟斤拷锟斤拷锟斤拷元锟侥匡拷锟斤拷锟斤拷锟斤拷锟皆拷母撸锟斤拷锟斤拷锟斤拷曳锟斤拷锟斤拷锟街革拷锟斤拷锟绞憋拷锟斤拷锟斤拷锟斤拷锟轿拷锟剿拷锟斤拷俣取锟斤拷锟斤拷凇锟斤拷锟斤拷锟斤拷锟斤拷凇锟斤拷锟斤拷锟教拷锟斤拷懈谋锟绞憋拷锟斤拷锟斤拷锟�

锟斤拷锟较ｏ拷锟斤拷锟斤拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷芄锟斤拷盏锟剿拷锟斤拷锟斤拷幕锟斤拷锟窖断拷锟斤拷锟矫达拷诤锟斤拷锟絉egisterClass锟斤拷始锟斤拷锟接达拷锟斤拷锟结构时锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷邪锟斤拷锟紺S_DBLCLKS识锟斤拷锟街ｏ拷

wndclass.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS ;

锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷未锟斤拷锟斤拷CS_DBLCLKS锟斤拷锟斤拷使锟斤拷锟斤拷锟节讹拷时锟斤拷锟斤拷双锟斤拷锟剿伙拷锟襟按硷拷锟斤拷锟斤拷么锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷盏锟斤拷锟斤拷锟斤拷锟叫┭断拷锟�

WM_LBUTTONDOWN

WM_LBUTTONUP

WM_LBUTTONDOWN

WM_LBUTTONUP

锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷些锟斤拷锟斤拷讯息之前锟斤拷锟秸碉拷锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷锟绞碉拷锟斤拷约锟斤拷锟剿拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫达拷锟斤拷锟斤拷锟绞癸拷锟絎indows锟斤拷式GetMessageTime取锟斤拷WM_LBUTTONDOWN讯息之锟斤拷锟斤拷锟斤拷时锟戒。锟节帮拷锟铰斤拷锟斤拷锟斤拷细锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟叫帮拷锟斤拷锟斤拷CS_DBLCLKS锟斤拷锟斤拷么双锟斤拷时锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟秸碉拷锟斤拷锟斤拷讯息锟斤拷

WM_LBUTTONDOWN

WM_LBUTTONUP

WM_LBUTTONDBLCLK

WM_LBUTTONUP

WM_LBUTTONDBLCLK讯息锟津单碉拷锟芥换锟剿第讹拷锟斤拷WM_LBUTTONDOWN讯息锟斤拷

锟斤拷锟剿拷锟斤拷械牡锟揭伙拷渭锟斤拷锟斤拷锟斤拷锟缴碉拷锟斤拷锟侥癸拷锟杰ｏ拷锟斤拷么双锟斤拷锟斤拷一讯息锟角猴拷锟斤拷锟阶达拷锟斤拷锟侥★拷锟节讹拷锟轿帮拷锟斤拷锟斤拷WM_LBUTTONDBLCLK讯息锟斤拷锟斤拷锟斤拷傻锟揭伙拷伟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟介。锟斤拷锟界，锟斤拷锟斤拷Windows Explorer锟斤拷锟斤拷锟斤拷锟斤拷没锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷斜锟斤拷摹锟斤拷锟揭伙拷渭锟斤拷锟窖★拷械锟斤拷锟斤拷锟絎indows Explorer锟矫凤拷锟斤拷锟斤拷示锟斤拷指锟斤拷锟斤拷选锟今档帮拷锟斤拷位锟矫★拷双锟斤拷锟斤拷实锟斤拷锟斤拷锟斤拷锟斤拷锟杰ｏ拷锟斤拷一锟斤拷锟角碉拷锟斤拷锟角革拷选锟叫碉拷锟斤拷锟斤拷锟节讹拷锟斤拷锟斤拷指锟斤拷Windows Explorer锟皆打开该碉拷锟斤拷锟斤拷执锟叫凤拷式锟洁当锟津单ｏ拷锟斤拷锟剿拷锟斤拷械牡锟揭伙拷伟锟斤拷锟斤拷锟街达拷械锟斤拷锟斤拷锟斤拷埽锟斤拷锟矫达拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷梅浅锟斤拷锟斤拷印锟�

锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息
锟斤拷

锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟铰伙拷锟襟按硷拷时锟斤拷锟斤拷锟斤拷锟斤拷10锟斤拷讯息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绞撅拷锟斤拷锟街拷獾拷锟斤拷锟斤拷哟锟斤拷冢锟絎indows锟酵革拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟津」伙拷锟斤拷讯息锟斤拷锟接达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小锟斤拷锟斤拷鼙锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷小锟�

通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟角斤拷锟斤拷些讯息锟斤拷锟斤拷DefWindowProc锟斤拷锟接讹拷使Windows执锟斤拷系统锟斤拷锟杰★拷锟斤拷锟解方锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟较低筹拷锟斤拷锟窖断M_SYSKEYDOWN锟斤拷WM_SYSKEYUP锟斤拷WM_SYSCHAR锟斤拷

锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷全锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷锟接︼拷锟窖断拷泻锟斤拷锟斤拷锟侥革拷锟絅C锟斤拷锟皆憋拷示锟角凤拷锟斤拷示锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷姆锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷贫锟斤拷锟斤拷锟矫达拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟秸碉拷WM_NCMOUSEMOVE讯息锟斤拷锟斤拷锟襟按硷拷锟斤拷锟斤拷锟斤拷锟�7-2锟斤拷示锟斤拷讯息锟斤拷

锟斤拷7-2

锟斤拷	锟斤拷锟斤拷	锟酵凤拷	锟斤拷锟铰ｏ拷双锟斤拷锟斤拷
锟斤拷	WM_NCLBUTTONDOWN	WM_NCLBUTTONUP	WM_NCLBUTTONDBLCLK
锟斤拷	WM_NCMBUTTONDOWN	WM_NCMBUTTONUP	WM_NCMBUTTONDBLCLK
锟斤拷	WM_NCRBUTTONDOWN	WM_NCRBUTTONUP	WM_NCRBUTTONDBLCLK

锟皆凤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷wParam锟斤拷lParam锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷wParam锟斤拷lParam锟斤拷锟斤拷锟斤拷同锟斤拷wParam锟斤拷锟斤拷指锟斤拷锟狡讹拷锟斤拷锟竭帮拷锟斤拷锟襟按硷拷锟侥凤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟借定为WINUSER.H锟叫讹拷锟斤拷锟斤拷锟紿T锟斤拷头锟斤拷识锟斤拷锟斤拷之一锟斤拷HT锟斤拷示锟斤拷锟斤拷锟叫诧拷锟皆★拷锟斤拷锟斤拷

lParam锟斤拷锟斤拷锟侥碉拷位元word为x锟斤拷锟疥，锟斤拷位元word为y锟斤拷锟疥，锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷萤幕锟斤拷锟疥，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讯息锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟疥。锟斤拷萤幕锟斤拷锟疥，锟斤拷示锟斤拷锟斤拷锟较角碉拷x锟斤拷y锟斤拷值为0锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷时x锟斤拷值锟斤拷锟接ｏ拷锟斤拷锟斤拷锟斤拷时y锟斤拷值锟斤拷锟接ｏ拷锟斤拷图7-2锟斤拷锟斤拷

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斤拷锟斤拷叻锟街拷锟�

ScreenToClient (hwnd, &pt) ;
ClientToScreen (hwnd, &pt) ;

锟斤拷锟斤拷pt锟斤拷POINT锟结构锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式转锟斤拷锟剿憋拷锟斤拷锟节结构锟叫碉拷值锟斤拷锟斤拷锟斤拷没锟叫憋拷锟斤拷锟斤拷前锟斤拷值锟斤拷注锟解，锟斤拷锟接┠伙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斤拷锟斤拷锟斤拷锟斤拷锟斤拷撸锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟絰锟斤拷y值锟斤拷锟角革拷值锟斤拷

锟斤拷

图7-2 萤幕锟斤拷锟斤拷锟斤拷突锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟叫诧拷锟斤拷讯息
锟斤拷

锟斤拷锟斤拷锟斤拷锟揭伙拷拢锟斤拷涂锟斤拷锟街拷锟斤拷锟斤拷锟斤拷丫锟斤拷锟斤拷锟斤拷锟�21锟斤拷锟斤拷锟斤拷讯息锟叫碉拷20锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷讯息锟斤拷WM_NCHITTEST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斤拷锟叫诧拷锟皆★拷锟斤拷锟斤拷讯息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撅拷锟斤拷锟酵凤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷lParam锟斤拷锟斤拷锟斤拷锟叫伙拷锟斤拷位锟矫碉拷x锟斤拷y萤幕锟斤拷锟疥，wParam锟斤拷锟斤拷没锟斤拷锟矫★拷

Windows应锟矫筹拷式通锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷透锟紻efWindowProc锟斤拷然锟斤拷Windows锟斤拷WM_NCHITTEST讯息锟斤拷锟斤拷锟诫滑锟斤拷位锟斤拷锟斤拷氐锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷锟届斗锟斤拷锟绞撅拷锟斤拷锟斤拷锟窖断拷锟斤拷诖锟斤拷锟絎M_NCHITTEST时锟斤拷锟斤拷DefWindowProc锟斤拷锟截碉拷值锟斤拷锟斤拷为锟斤拷锟斤拷讯息锟叫碉拷wParam锟斤拷锟斤拷锟斤拷锟斤拷锟街碉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斤拷讯息锟斤拷wParam值锟劫硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟捷ｏ拷

HTCLIENT

HTNOWHERE

HTTRANSPARENT

HTERROR

锟斤拷示锟斤拷锟斤拷

锟斤拷锟斤拷锟接达拷锟斤拷

锟接达拷锟斤拷锟斤拷一锟斤拷锟接达拷锟斤拷锟斤拷

使DefWindowProc锟斤拷锟斤拷锟斤拷示锟矫碉拷锟斤拷锟斤拷

锟斤拷锟紻efWindowProc锟斤拷锟戒处锟斤拷WM_NCHITTEST讯息锟结传锟斤拷HTCLIENT锟斤拷锟斤拷么Windows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并锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷讯息锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷堑锟斤拷锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷WM_SYSKEYDOWN讯息锟斤拷停锟斤拷锟斤拷锟叫碉拷系统锟斤拷锟教癸拷锟杰ｏ拷锟斤拷么锟斤拷锟斤拷锟杰伙拷锟斤拷锟斤拷锟角可凤拷通锟斤拷锟斤拷锟截伙拷锟斤拷讯息锟斤拷锟斤拷锟斤拷频锟斤拷锟斤拷椤ｏ拷锟饺拷锟斤拷裕锟街灰拷锟斤拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷邪锟斤拷锟斤拷锟斤拷录锟斤拷锟斤拷锟斤拷锟斤拷锟�

case WM_NCHITTEST:
   	return (LRESULT) HTNOWHERE ;

锟酵匡拷锟斤拷锟斤拷效锟截斤拷锟斤拷锟斤拷锟接达拷锟叫碉拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷头锟斤拷锟绞撅拷锟斤拷锟斤拷锟窖断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斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟较低筹拷锟斤拷鼙锟酵际撅拷锟斤拷锟斤拷虐锟脚ワ拷约锟斤拷乇瞻锟脚ワ拷锟斤拷锟绞憋拷锟斤拷锟斤拷蟀醇锟斤拷锟斤拷锟绞э拷锟�

锟斤拷讯息锟斤拷锟斤拷讯息
锟斤拷

Windows锟斤拷WM_NCHITTEST讯息锟斤拷锟斤拷锟斤拷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锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷讯息锟斤拷锟诫法锟斤拷Windows锟斤拷锟角猴拷锟秸憋拷摹锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷俑锟斤拷锟斤拷印锟斤拷锟街拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷Windows锟斤拷式锟斤拷系统锟斤拷锟杰憋拷图示锟斤拷双锟斤拷一锟铰ｏ拷锟斤拷么锟斤拷式锟斤拷锟斤拷锟斤拷止锟斤拷双锟斤拷锟斤拷锟斤拷一系锟叫碉拷WM_NCHITTEST讯息锟斤拷锟斤拷於伙拷锟斤拷位锟斤拷系统锟斤拷锟杰憋拷图示锟较ｏ拷锟斤拷锟紻efWindowProc锟斤拷锟斤拷锟斤拷HTSYSMENU锟斤拷值锟斤拷锟斤拷锟斤拷Windows锟斤拷wParam锟斤拷锟紿TSYSMENU锟斤拷WM_NCLBUTTONDBLCLK讯息锟斤拷锟斤拷讯息锟斤拷锟斤拷锟叫★拷

锟接达拷讯息锟斤拷锟斤拷锟斤拷式通锟斤拷锟窖伙拷锟斤拷讯息锟斤拷锟捷革拷DefWindowProc锟斤拷锟斤拷DefWindowProc锟斤拷锟秸碉拷wParam锟斤拷锟斤拷锟斤拷锟紿TSYSMENU锟斤拷WM_NCLBUTTONDBLCLK讯息时锟斤拷锟斤拷锟酵帮拷wParam锟斤拷锟斤拷锟斤拷锟絊C_CLOSE锟斤拷WM_SYSCOMMAND讯息锟斤拷锟斤拷讯息锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟絎M_SYSCOMMAND讯息锟斤拷锟斤拷使锟斤拷锟竭达拷系统锟斤拷锟杰憋拷锟斤拷选锟斤拷Close锟斤拷时锟斤拷锟斤拷锟侥ｏ拷锟斤拷同锟斤拷锟截ｏ拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式也锟斤拷锟斤拷锟窖断拷锟斤拷锟紻efWindowProc锟斤拷DefWindowProc通锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷WM_CLOSE讯息锟斤拷锟斤拷锟斤拷锟斤拷讯息锟斤拷

锟斤拷锟揭伙拷锟斤拷锟绞斤拷锟斤拷锟街怪耙拷锟斤拷锟斤拷锟绞癸拷锟斤拷叩锟饺凤拷希锟斤拷锟矫达拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟揭拷锟斤拷锟絎M_CLOSE锟斤拷锟斤拷锟斤拷DefWindowProc锟斤拷锟斤拷DestroyWindow锟斤拷式锟斤拷锟斤拷锟斤拷WM_CLOSE锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷DestroyWindow锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷一锟斤拷WM_DESTROY讯息锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式通锟斤拷锟斤拷锟斤拷锟叫筹拷式锟斤拷锟斤拷锟斤拷锟斤拷WM_DESTROY讯息锟斤拷

case	WM_DESTROY:
	PostQuitMessage (0) ;
	return 0 ;

PostQuitMessage使锟斤拷Windows锟斤拷WM_QUIT讯息锟斤拷锟斤拷讯息锟斤拷锟斤拷锟叫ｏ拷锟斤拷讯息锟斤拷远锟斤拷锟结到锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷为锟斤拷使GetMessage锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷止讯息锟斤拷圈锟斤拷锟接讹拷也锟斤拷止锟剿筹拷式锟斤拷

锟斤拷式锟叫碉拷锟斤拷锟叫诧拷锟斤拷
锟斤拷

锟斤拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷Windows Explorer锟斤拷位锟接︼拷锟斤拷锟侥碉拷锟斤拷锟斤拷双锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷式锟斤拷锟斤拷锟竭革拷锟斤拷确锟斤拷说锟斤拷锟斤拷同Windows Explorer锟斤拷使锟斤拷list view control锟斤拷锟斤拷锟斤拷确锟斤拷使锟斤拷锟竭伙拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷胁锟斤拷浴锟斤拷锟斤拷锟斤拷锟紻efWindowProc锟节达拷锟斤拷WM_NCHITTEST讯息时锟斤拷一些锟斤拷锟叫诧拷锟斤拷一锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式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斤拷锟斤拷一些锟斤拷锟叫诧拷锟皆★拷一锟斤拷锟斤拷说锟斤拷锟斤拷锟叫诧拷锟斤拷锟叫伙拷使锟斤拷x锟斤拷y锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷锟缴达拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟侥伙拷锟斤拷讯息锟斤拷lParam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锟�
锟斤拷

锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷锟侥筹拷式锟斤拷要锟斤拷示锟斤拷锟叫帮拷锟斤拷母锟斤拷锟叫的碉拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷list view control锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷全锟斤拷锟斤拷锟斤拷锟叫诧拷锟皆癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟角硷拷锟斤拷锟斤拷锟斤拷锟侥筹拷锟皆拷锟斤拷锟斤拷锟斤拷使锟矫ｏ拷锟斤拷时锟斤拷锟斤拷要锟皆硷拷锟斤拷锟斤拷锟剿★拷锟斤拷锟斤拷锟角假讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节筹拷为szFileNames锟斤拷锟斤拷锟斤拷锟斤拷锟街达拷指锟斤拷锟斤拷锟斤拷锟叫★拷

锟斤拷锟斤拷锟斤拷也锟劫讹拷锟斤拷锟斤拷锟叫憋拷锟斤拷始锟斤拷锟绞撅拷锟斤拷锟侥讹拷锟剿ｏ拷锟斤拷示锟斤拷锟斤拷为cxClient图锟截匡拷锟斤拷 cyClient图锟截高ｏ拷每锟斤拷为cxColWidth图锟截匡拷锟斤拷每锟斤拷锟斤拷元锟竭讹拷为cyChar图锟截高★拷锟斤拷么每锟斤拷锟斤拷锟斤拷锟斤拷牡锟斤拷锟斤拷锟斤拷锟斤拷牵锟�

iNumInCol = cyClient / cyChar ;

锟斤拷锟秸碉拷一锟斤拷锟斤拷锟襟单伙拷讯息锟结，锟斤拷锟斤拷锟杰达拷lParam锟斤拷锟絚xMouse锟斤拷cyMouse锟斤拷锟疥。然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥癸拷式锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷一锟叫的碉拷锟斤拷锟斤拷锟斤拷

iColumn = cxMouse / cxColWidth ;

锟斤拷锟斤拷锟叫讹拷锟剿的碉拷锟斤拷锟斤拷位锟斤拷为锟斤拷

iFromTop = cyMouse / cyChar ;

锟斤拷锟斤拷锟斤拷锟酵匡拷锟皆硷拷锟斤拷szFileNames锟斤拷锟叫碉拷锟铰标：

iIndex = iColumn * iNumInCol + iFromTop ;

锟斤拷锟絠Index锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫的碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞臼癸拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷目瞻锟斤拷锟斤拷锟斤拷诎锟斤拷锟斤拷蟀醇锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拢锟斤拷锟斤拷胁锟斤拷锟揭拷缺锟斤拷锟斤拷锟斤拷痈锟斤拷印锟斤拷锟斤拷锟绞疽伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫⊥硷拷蔚锟酵硷拷锟绞憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷示锟斤拷每锟斤拷小图锟轿碉拷锟斤拷锟疥。锟斤拷锟斤拷锟叫硷拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷业锟斤拷锟斤拷锟斤拷锟斤拷锟解将锟斤拷使锟矫诧拷确锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷执锟斤拷锟斤拷锟绞斤拷斜锟矫非筹拷锟斤拷锟揭ｏ拷锟斤拷为锟斤拷锟斤拷锟斤拷锟揭碉拷锟斤拷元锟斤拷锟街达拷锟叫碉拷位锟矫★拷

锟斤拷锟斤拷锟斤拷式
锟斤拷

锟斤拷式7-2锟斤拷示锟斤拷CHECKER1锟斤拷式展示锟斤拷一些锟津单碉拷锟斤拷锟叫诧拷锟皆ｏ拷锟剿筹拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟轿�5锟斤拷5锟斤拷25锟斤拷锟斤拷锟轿★拷锟斤拷锟斤拷锟斤拷锟侥筹拷锟斤拷锟斤拷锟斤拷邪锟斤拷禄锟斤拷蟀醇锟斤拷锟斤拷锟矫达拷诟镁锟斤拷锟斤拷薪锟斤拷锟斤拷锟揭伙拷锟斤拷锟絏锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷侔锟揭伙拷危锟斤拷锟矫达拷锟絏锟斤拷锟斤拷锟斤拷删锟斤拷锟斤拷

 锟斤拷式7-2  CHECKER1
CHECKER1.C
/*-------------------------------------------------------------------------
   	CHECKER1.C --	 	Mouse Hit-Test Demo Program No. 1
                 						(c) Charles Petzold, 1998
--------------------------------------------------------------------------*/

#include <windows.h>
#define DIVISIONS 5
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR  szCmdLine, int iCmdShow)
{	    static TCHAR	szAppName[] = TEXT ("Checker1") ;
     	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 ("Checker1 Mouse Hit-Test Demo"),
                       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,LPARAMlParam)
{
     	static BOOL 	fState[DIVISIONS][DIVISIONS] ;
     	static int  		cxBlock, cyBlock ;
     	HDC         				hdc ;
     	int         				x, y ;
     	PAINTSTRUCT 		ps ;
     	RECT        				rect ;
     
     	switch (message)
     {
     	case 	WM_SIZE :
          		cxBlock = LOWORD (lParam) / DIVISIONS ;
          		cyBlock = HIWORD (lParam) / DIVISIONS ;
          		return 0 ;
          
     	case WM_LBUTTONDOWN :
          		x = LOWORD (lParam) / cxBlock ;
          		y = HIWORD (lParam) / cyBlock ;
          
          		if (x < DIVISIONS && y < DIVISIONS)
          		{
               				fState [x][y] ^= 1 ;
               				rect.left 			= x * cxBlock ;
               				rect.top 			= y * cyBlock ;
               				rect.right 			= (x + 1) * cxBlock ;
               				rect.bottom 		= (y + 1) * cyBlock ;
               
               				InvalidateRect (hwnd, &rect, FALSE) ;
          		}
          		else
               				MessageBeep (0) ;
       		return 0 ;
          
     	case 	WM_PAINT :
          		hdc = BeginPaint (hwnd, &ps) ;
          
          		for (x = 0 ; x < DIVISIONS ; x++)
          		for (y = 0 ; y < DIVISIONS ; y++)
          		{
               			Rectangle (hdc, x * cxBlock, y * cyBlock,
                         		(x + 1) * cxBlock, (y + 1) * cyBlock) ;
                    
               		if (fState [x][y])
               		{
                    		MoveToEx	(hdc, x * cxBlock,  y * cyBlock, NULL) ;
                    		LineTo	(hdc, (x+1) * cxBlock, (y+1) * cyBlock) ;
			MoveToEx (hdc, x * cxBlock, (y+1) * cyBlock, NULL) ;
			LineTo 	(hdc, (x+1) * cxBlock, y  * cyBlock) ;
               			}
          		}
          		EndPaint (hwnd,&ps);	
		return 0 ;
               
     	case 	WM_DESTROY :
          		PostQuitMessage (0) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

图7-3锟斤拷CHECKER1锟斤拷锟斤拷示锟斤拷锟斤拷式锟斤拷锟斤拷25锟斤拷锟斤拷锟轿的匡拷锟饺和高度撅拷锟斤拷同锟斤拷锟斤拷些锟斤拷锟饺和高度憋拷锟斤拷锟斤拷cxBlock锟斤拷cyBlock锟叫ｏ拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷谋锟绞憋拷锟斤拷锟斤拷锟斤拷露锟斤拷锟叫┲碉拷锟斤拷屑锟斤拷恪M_LBUTTONDOWN锟斤拷锟斤拷锟斤拷锟斤拷使锟矫伙拷锟斤拷锟斤拷锟斤拷锟斤拷确锟斤拷锟斤拷锟侥革拷锟斤拷锟斤拷锟叫帮拷锟斤拷锟剿硷拷锟斤拷锟斤拷锟斤拷fState锟斤拷锟斤拷锟叫憋拷志目前锟斤拷锟轿碉拷状态锟斤拷锟斤拷使锟矫撅拷锟斤拷锟斤拷锟斤拷失效锟斤拷锟接讹拷锟斤拷锟斤拷WM_PAINT讯息锟斤拷

锟斤拷

图7-3 CHECKER1锟斤拷萤幕锟斤拷示

锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥匡拷锟饺和高度诧拷锟杰憋拷5锟斤拷锟斤拷锟斤拷锟斤拷么锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟竭猴拷锟铰边斤拷锟斤拷一小锟斤拷锟斤拷锟斤拷锟杰憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟角★拷锟斤拷於达拷锟斤拷锟斤拷锟斤拷锟紺HECKER1通锟斤拷锟斤拷锟斤拷MessageBeep锟斤拷应锟斤拷锟斤拷锟斤拷锟叫的伙拷锟襟按硷拷锟斤拷锟斤拷锟斤拷

锟斤拷CHECKER1锟秸碉拷WM_PAINT讯息时锟斤拷锟斤拷通锟斤拷GDI锟斤拷Rectangle锟斤拷式锟斤拷锟斤拷锟铰伙拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷瓒拷锟絝State值锟斤拷锟斤拷么CHECKER1锟斤拷使锟斤拷MoveToEx锟斤拷LineTo锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷直锟竭★拷锟节达拷锟斤拷WM_PAINT锟节间，CHECKER1锟斤拷锟斤拷锟铰伙拷锟斤拷之前锟斤拷锟斤拷锟斤拷锟矫匡拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷效锟皆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锟叫э拷缘锟揭伙拷址锟斤拷锟斤拷锟斤拷诨锟饺︼拷锟轿匡拷锟斤拷锟斤拷慰榻拷锟絉ECT锟结构锟斤拷使锟斤拷锟斤拷WM_LBUTTONDOWN锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷同锟侥癸拷式锟斤拷锟斤拷锟斤拷使锟斤拷IntersectRect锟斤拷式锟斤拷锟斤拷锟斤拷欠锟斤拷锟斤拷锟叫э拷锟斤拷危锟絧s.rcPaint锟斤拷锟洁交锟斤拷

使锟矫硷拷锟斤拷模锟解滑锟斤拷
锟斤拷

CHECKER1只锟斤拷锟斤拷装锟叫伙拷锟斤拷锟斤拷锟斤拷虏趴锟街达拷小锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诔锟绞斤拷屑锟斤拷锟斤拷锟教斤拷锟芥，锟斤拷锟斤拷同锟斤拷锟斤拷锟斤拷锟叫讹拷SYSMETS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斤拷锟斤拷锟斤拷使锟斤拷一锟斤拷使锟矫伙拷锟斤拷锟轿憋拷锟斤拷为指锟斤拷锟斤拷途锟侥筹拷式锟叫硷拷锟斤拷锟斤拷探锟斤拷妫拷锟斤拷腔锟斤拷潜锟斤拷氪︼拷锟斤拷锟斤拷锟斤拷伪锟斤拷锟狡讹拷锟斤拷锟斤拷示锟斤拷锟解。

锟斤拷使没锟叫帮拷装锟斤拷锟斤拷Windows锟斤拷然锟斤拷锟斤拷锟斤拷示一锟斤拷锟斤拷锟斤拷锟轿标。Windows为锟斤拷锟斤拷伪瓯ｏ拷锟斤拷锟揭伙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斤拷装锟剿伙拷锟斤拷锟斤拷示锟斤拷锟斤拷锟结被锟斤拷始锟斤拷为0锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟结被锟斤拷始锟斤拷为-1锟斤拷只锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟角革拷时锟斤拷锟斤拷示锟斤拷锟斤拷锟轿标。要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皆猴拷锟叫ｏ拷

ShowCursor (TRUE) ;

要锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟皆猴拷锟叫ｏ拷

ShowCursor (FALSE) ;

锟斤拷锟斤拷使锟斤拷ShowCursor之前锟斤拷锟斤拷锟斤拷要确锟斤拷锟角凤拷装锟剿伙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伪辏拷锟斤拷锟斤拷芑锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫粗伙拷锟斤拷锟斤拷ShowCursor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一锟斤拷锟斤拷示锟斤拷锟斤拷之锟结，锟斤拷锟矫伙拷邪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锟斤拷锟轿标，锟斤拷锟斤拷锟阶帮拷嘶锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟�

锟斤拷使没锟叫帮拷装锟斤拷锟斤拷Windows也锟斤拷锟斤拷锟剿伙拷锟斤拷目前锟斤拷位锟矫★拷锟斤拷锟矫伙拷邪锟阶帮拷锟斤拷螅锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷伪辏拷伪锟酵匡拷锟杰筹拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷位锟矫ｏ拷直锟斤拷锟斤拷确实锟狡讹拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷伪锟斤拷位锟矫ｏ拷锟斤拷锟皆猴拷锟叫ｏ拷

GetCursorPos (&pt) ;

锟斤拷锟斤拷pt锟斤拷POINT锟结构锟斤拷锟斤拷式使锟矫伙拷锟斤拷锟絰锟斤拷y锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷POINT锟斤拷位锟斤拷要锟借定锟轿憋拷位锟矫ｏ拷锟斤拷锟斤拷使锟矫ｏ拷

SetCursorPos (x, y) ;

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拢锟絰锟斤拷y锟斤拷锟斤拷萤幕锟斤拷锟疥，锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟疥（锟斤拷锟角猴拷锟斤拷锟皆的ｏ拷锟斤拷为锟斤拷些锟斤拷式没锟斤拷要锟斤拷hwnd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锟斤拷锟斤拷ScreenToClient锟斤拷ClientToScreen锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟斤拷锟斤拷锟斤拷突锟斤拷锟斤拷锟斤拷锟洁互转锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷诖锟斤拷锟斤拷锟斤拷锟窖断拷锟阶拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷锟紾etCursorPos 锟斤拷锟斤拷些锟斤拷锟斤拷锟斤拷锟斤拷牖拷锟窖断拷锟絣Param锟斤拷锟斤拷锟叫碉拷锟斤拷锟斤拷锟斤拷微锟斤拷些锟斤拷同锟斤拷锟斤拷GetCursorPos锟斤拷锟截碉拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥壳帮拷锟轿伙拷谩锟絣Param锟叫碉拷锟斤拷锟斤拷锟斤拷锟角诧拷锟斤拷讯息时锟斤拷锟斤拷锟轿伙拷谩锟�

锟斤拷锟斤拷锟斤拷锟斤拷写一锟斤拷锟斤拷锟教达拷锟斤拷锟斤拷式锟斤拷使锟矫硷拷锟教凤拷锟斤拷锟斤拷锟斤拷贫锟斤拷锟斤拷锟斤拷伪辏癸拷锟絊pacebar锟斤拷Enter锟斤拷锟斤拷模锟解滑锟襟按硷拷锟斤拷锟斤拷锟较讹拷锟斤拷希锟斤拷每锟轿帮拷锟斤拷只锟角斤拷锟斤拷锟斤拷锟轿憋拷锟狡讹拷一锟斤拷图锟截ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭拷鸦锟斤拷锟斤拷伪锟斤拷锟斤拷示锟斤拷锟斤拷一锟斤拷锟狡讹拷锟斤拷锟斤拷一锟斤拷时锟斤拷锟斤拷使锟斤拷锟斤拷锟节很筹拷一锟斤拷时锟斤拷锟节讹拷要锟斤拷住同一锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷锟斤拷伪锟侥硷拷锟教斤拷锟芥，锟斤拷锟斤拷锟斤拷锟轿憋拷木锟饺凤拷锟轿伙拷锟斤拷锟斤拷锟斤拷锟矫达拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷锟侥凤拷式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锟铰凤拷锟斤拷锟绞憋拷锟揭伙拷锟绞硷拷锟斤拷锟斤拷伪锟斤拷贫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷涌臁ｏ拷锟揭诧拷锟斤拷锟斤拷堑锟絎M_KEYDOWN讯息锟叫碉拷lParam锟斤拷锟斤拷锟斤拷志锟斤拷锟斤拷锟斤拷讯息锟角凤拷锟斤拷锟截革拷锟筋动锟侥斤拷锟斤拷锟斤拷锟斤拷锟角此诧拷锟斤拷锟斤拷一锟斤拷锟斤拷要应锟矫★拷

锟斤拷CHECKER锟叫硷拷锟斤拷锟斤拷探锟斤拷锟�
锟斤拷

锟斤拷式7-3锟斤拷示锟斤拷CHECKER2锟斤拷式锟斤拷锟斤拷锟剿帮拷锟斤拷锟斤拷锟教斤拷锟斤拷锟解，锟斤拷CHECKER1锟斤拷一锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟揭★拷锟较猴拷锟铰凤拷锟斤拷锟斤拷锟�25锟斤拷锟斤拷锟斤拷之锟斤拷锟狡讹拷锟轿标。Home锟斤拷锟斤拷锟轿憋拷锟狡讹拷锟斤拷锟斤拷锟轿碉拷锟斤拷锟较角ｏ拷 End锟斤拷锟斤拷锟轿憋拷锟狡讹拷锟斤拷锟斤拷锟轿碉拷锟斤拷锟铰角★拷Spacebar锟斤拷Enter锟斤拷锟斤拷锟斤拷锟叫伙拷X锟斤拷恰锟�

 锟斤拷式7-3  CHECKER2
CHECKER2.C
/*----------------------------------------------------------------------------
   CHECKER2.C --	Mouse Hit-Test Demo Program No. 2
						(c) Charles Petzold, 1998
----------------------------------------------------------------------------*/

#include <windows.h>

#define DIVISIONS 5

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

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
						PSTR szCmdLine, int iCmdShow)
{
     	static TCHAR szAppName[] = TEXT ("Checker2") ;
     	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 ("Checker2 Mouse Hit-Test Demo"),
                       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 BOOL	fState[DIVISIONS][DIVISIONS] ;
     	static int 		cxBlock, cyBlock ;
     	HDC         				hdc ;
     	int         				x, y ;
     	PAINTSTRUCT 		          ps ;
     	POINT       				point ;
     	RECT        				rect ;
     
     	switch (message)
     	{
     	case 	WM_SIZE :
          		cxBlock = LOWORD (lParam) / DIVISIONS ;
          		cyBlock = HIWORD (lParam) / DIVISIONS ;
          		return 0 ;
          
     	case 	WM_SETFOCUS :
          		ShowCursor (TRUE) ;
          		return 0 ;
          
     	case 	WM_KILLFOCUS :
          		ShowCursor (FALSE) ;
          		return 0 ;
          
     	case 	WM_KEYDOWN :
          		GetCursorPos (&point) ;
          		ScreenToClient (hwnd, &point) ;
          		x = max (0, min (DIVISIONS - 1, point.x / cxBlock)) ;
          		y = max (0, min (DIVISIONS - 1, point.y / cyBlock)) ;
          
          		switch (wParam)
          		{
          			case VK_UP :
               					y-- ;
               					break ;
               
          			case 	VK_DOWN :
               					y++ ;
               					break ;
               
          			case 	VK_LEFT :
               					x-- ;
               					break ;
               
          			case 	VK_RIGHT :
               					x++ ;
               					break ;
               
          			case 	VK_HOME :
               					x = y = 0 ;
               					break ;
               
          			case 	VK_END :
               					x = y = DIVISIONS - 1 ;
               					break ;
               
          			case 	VK_RETURN :
          			case 	VK_SPACE :
               					SendMessage (hwnd, WM_LBUTTONDOWN, MK_LBUTTON,
                            	MAKELONG (x * cxBlock, y * cyBlock)) ;
               					break ;
          		}
			x = (x + DIVISIONS) % DIVISIONS ;
          			y = (y + DIVISIONS) % DIVISIONS ;
          
          			point.x = x * cxBlock + cxBlock / 2 ;
          			point.y = y * cyBlock + cyBlock / 2 ;
          
          			ClientToScreen (hwnd, &point) ;
          			SetCursorPos (point.x, point.y) ;
      			return 0 ;
     	case	WM_LBUTTONDOWN :
		x = LOWORD (lParam) / cxBlock ;
		y = HIWORD (lParam) / cyBlock ;
          
		if (x < DIVISIONS && y < DIVISIONS)
          		{
               					fState[x][y] ^= 1 ;
               
               					rect.left     = x * cxBlock ;
               					rect.top      = y * cyBlock ;
               					rect.right    = (x + 1) * cxBlock ;
               					rect.bottom   = (y + 1) * cyBlock ;
               
               					InvalidateRect (hwnd, &rect, FALSE) ;
          }
          		else
               					MessageBeep (0) ;
          		return 0 ;
     	case 	WM_PAINT :
		hdc = BeginPaint (hwnd, &ps) ;
          
         		for (x = 0 ; x < DIVISIONS ; x++)
          		for (y = 0 ; y < DIVISIONS ; y++)
          		{
               			Rectangle (hdc, x * cxBlock, y * cyBlock,
                          		(x + 1) * cxBlock, (y + 1) * cyBlock) ;
                    
               			if (fState [x][y])
               			{
                    MoveToEx (hdc,  x   *cxBlock,  y   *cyBlock, NULL) ;
					LineTo   (hdc, (x+1)*cxBlock, (y+1)*cyBlock) ;
					MoveToEx (hdc,  x   *cxBlock, (y+1)*cyBlock, NULL) ;
                    LineTo   (hdc, (x+1)*cxBlock,  y   *cyBlock) ;
               			}
          		}
          		EndPaint (hwnd, &ps) ;
          		return 0 ;
               
	case 	WM_DESTROY :
          		PostQuitMessage (0) ;
          		return 0 ;
  	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

CHECKER2锟叫碉拷WM_KEYDOWN锟侥达拷锟斤拷锟斤拷式锟斤拷锟斤拷锟轿憋拷锟轿伙拷茫锟斤拷锟紾etCursorPos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（锟斤拷ScreenToClient锟斤拷锟斤拷锟斤拷锟矫撅拷锟轿凤拷锟斤拷目锟斤拷群透叨锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟疥。锟斤拷锟斤拷锟斤拷指示锟斤拷锟斤拷位锟矫碉拷x锟斤拷y值锟斤拷5锟斤拷5锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟轿憋拷锟斤拷锟斤拷诨锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷校锟斤拷锟斤拷锟絰锟斤拷y锟斤拷锟诫经锟斤拷min锟斤拷max锟睫硷拷锟斤拷锟斤拷锟皆憋拷证锟斤拷锟角的凤拷围锟斤拷0锟斤拷4之锟戒。

锟皆凤拷锟斤拷锟斤拷锟紺HECKER2锟斤拷锟狡碉拷锟斤拷锟接伙拷锟斤拷锟絰锟斤拷y锟斤拷锟斤拷锟斤拷锟紼nter锟斤拷锟斤拷Spacebar锟斤拷锟斤拷锟斤拷么CHECKER2使锟斤拷SendMessage锟斤拷WM_LBUTTONDOWN讯息锟斤拷锟酵革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟节碉拷锟斤拷锟斤拷SYSMETS锟斤拷式锟叫把硷拷锟教斤拷锟斤拷拥锟斤拷哟锟斤拷锟斤拷锟斤拷锟绞憋拷锟绞癸拷玫姆锟斤拷锟斤拷锟絎M_KEYDOWN锟侥达拷锟斤拷锟斤拷式锟斤拷通锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷牡锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷辏拷锟斤拷锟紺lientToScreen转锟斤拷锟斤拷萤幕锟斤拷锟疥，然锟斤拷锟斤拷SetCursorPos锟借定锟轿憋拷位锟斤拷锟斤拷实锟斤拷锟侥★拷

锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷胁锟斤拷锟�
锟斤拷

锟斤拷些锟斤拷式锟斤拷锟斤拷锟界，Windows锟侥★拷锟斤拷图锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟津划凤拷为锟斤拷锟斤拷小锟斤拷锟竭硷拷锟斤拷锟津。★拷锟斤拷图锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟酵际撅拷锟缴的癸拷锟竭癸拷锟杰憋拷锟斤拷锟斤拷锟节底诧拷锟斤拷锟斤拷色锟斤拷锟杰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叫诧拷锟皆碉拷时锟津，★拷锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷选锟叫癸拷锟杰憋拷锟斤拷之前锟斤拷住锟斤拷锟杰憋拷锟斤拷位锟矫★拷

锟斤拷锟斤拷锟斤拷也锟斤拷锟杰诧拷锟斤拷要锟斤拷么锟斤拷锟斤拷实锟斤拷锟较ｏ拷锟斤拷锟界经锟斤拷使锟斤拷锟斤拷锟接达拷锟斤拷锟剿癸拷锟杰憋拷锟侥伙拷锟狡猴拷锟斤拷锟叫诧拷锟皆★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锟津划凤拷为锟斤拷锟斤拷锟斤拷小锟侥撅拷锟斤拷锟斤拷锟斤拷每锟斤拷锟斤拷锟接达拷锟斤拷锟皆硷拷锟斤拷锟接达拷锟斤拷锟脚★拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷示锟斤拷锟斤拷每锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷幕锟斤拷锟窖断拷锟斤拷锟斤拷锟窖断拷械锟絣Param锟斤拷锟斤拷锟斤拷锟斤拷锟洁当於革拷锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷锟斤拷锟较角碉拷锟斤拷锟疥，锟斤拷锟斤拷锟斤拷锟戒父锟接达拷锟斤拷锟斤拷锟角★拷锟斤拷图锟斤拷锟斤拷锟斤拷应锟矫筹拷式锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟较角碉拷锟斤拷锟疥。

锟斤拷锟斤拷锟街凤拷式使锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷於筹拷式锟侥结构锟斤拷锟斤拷模锟介化锟斤拷锟斤拷锟斤拷锟斤拷哟锟绞癸拷貌锟酵拷锟斤拷哟锟斤拷锟斤拷锟斤拷么每锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷同锟斤拷锟接达拷也锟斤拷锟皆讹拷锟藉不同锟侥憋拷锟斤拷锟斤拷色锟酵诧拷同锟斤拷锟节讹拷锟轿标。锟节第撅拷锟斤拷锟叫ｏ拷锟揭斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟筋」锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷钮锟酵编辑锟斤拷锟斤拷锟皆わ拷榷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟节ｏ拷锟斤拷锟斤拷说锟斤拷锟斤拷CHECKER锟斤拷式锟斤拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷哟锟斤拷摹锟�

CHECKER锟叫碉拷锟斤拷锟接达拷
锟斤拷

锟斤拷式7-4锟斤拷示锟斤拷CHECKER3锟斤拷式锟斤拷锟斤拷一锟芥本锟斤拷锟斤拷锟斤拷25锟斤拷锟斤拷锟斤拷锟斤拷锟襟单伙拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷没锟叫硷拷锟教斤拷锟芥，锟斤拷锟角匡拷锟皆帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟紺HECKER4锟斤拷式锟斤拷锟斤拷锟侥凤拷锟斤拷锟斤拷锟接★拷

 锟斤拷式7-4  CHECKER3
CHECKER3.C
/*---------------------------------------------------------------------------
   CHECKER3.C --	Mouse Hit-Test Demo Program No. 3
          						(c) Charles Petzold, 1998
----------------------------------------------------------------------------*/

#include <windows.h>

#define DIVISIONS 5

LRESULT CALLBACK WndProc   (HWND, UINT, WPARAM, LPARAM) ;
LRESULT CALLBACK ChildWndProc (HWND, UINT, WPARAM, LPARAM) ;
TCHAR szChildClass[] 					= TEXT ("Checker3_Child") ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    						PSTR szCmdLine, int iCmdShow)
{
     	static TCHAR	szAppName[]	= TEXT ("Checker3") ;
     	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 ;
     	}
     
	wndclass.lpfnWndProc   			= ChildWndProc ;
     	wndclass.cbWndExtra    		= sizeof (long) ;
     	wndclass.hIcon         		= NULL ;
     	wndclass.lpszClassName 		= szChildClass ;

     	RegisterClass (&wndclass) ;
     	hwnd = CreateWindow (	szAppName, TEXT ("Checker3 Mouse Hit-Test Demo"),
                         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 HWND 	hwndChild[DIVISIONS][DIVISIONS] ;
     	int    				cxBlock, cyBlock, x, y ;
     
     	switch (message)
     {
     	case 	WM_CREATE :
          		for (x = 0 ; x < DIVISIONS ; x++)
               		for (y = 0 ; y < DIVISIONS ; y++)
                    hwndChild[x][y] = CreateWindow (szChildClass, NULL,
                    WS_CHILDWINDOW | WS_VISIBLE,
                    0, 0, 0, 0,
         	        hwnd, (HMENU) (y << 8 | x),
                    (HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE),
                              								NULL) ;
          		return 0 ;
               
     	case 	WM_SIZE :
          		cxBlock = LOWORD (lParam) / DIVISIONS ;
          		cyBlock = HIWORD (lParam) / DIVISIONS ;
          		for (x = 0 ; x < DIVISIONS ; x++)
                				for (y = 0 ; y < DIVISIONS ; y++)
                    						MoveWindow (	hwndChild[x][y],
                                			x * cxBlock, y * cyBlock,
                                			    cxBlock, cyBlock, TRUE) ;
          		return 0 ;

     	case 	WM_LBUTTONDOWN :
          		MessageBeep (0) ;
          		return 0 ;
          
     	case 	WM_DESTROY :
          		PostQuitMessage (0) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

LRESULT CALLBACK ChildWndProc (HWND hwnd, UINT message, 
                WPARAM wParam, LPARAM lParam)
{
     	HDC         					hdc ;
     	PAINTSTRUCT 			        ps ;
     	RECT        					rect ;
     
     	switch (message)
     	{
     	case 	WM_CREATE :
          		SetWindowLong (hwnd, 0, 0) ;       // on/off flag
          		return 0 ;
          
     	case 	WM_LBUTTONDOWN :
          		SetWindowLong (hwnd, 0, 1 ^ GetWindowLong (hwnd, 0)) ;
          		InvalidateRect (hwnd, NULL, FALSE) ;
          		return 0 ;
          
     	case 	WM_PAINT :
          		hdc = BeginPaint (hwnd, &ps) ;
          
          		GetClientRect (hwnd, &rect) ;
          		Rectangle (hdc, 0, 0, rect.right, rect.bottom) ;
          
          		if (GetWindowLong (hwnd, 0))
          		{
               				MoveToEx (hdc, 0,          0, NULL) ;
               				LineTo   (hdc, rect.right, rect.bottom) ;
               				MoveToEx (hdc, 0,          rect.bottom, NULL) ;
               				LineTo   (hdc, rect.right, 0) ;
      		}
          
          		EndPaint (hwnd, &ps) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

CHECKER3锟斤拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式WndProc锟斤拷ChildWndProc锟斤拷WndProc锟斤拷锟斤拷锟斤拷锟斤拷锟津父ｏ拷锟接达拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷ChildWndProc锟斤拷锟斤拷锟�25锟斤拷锟斤拷锟接达拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟诫定锟斤拷为CALLBACK锟斤拷式锟斤拷

锟斤拷为锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟截讹拷锟斤拷锟接达拷锟斤拷锟结构锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷峁癸拷锟絎indows锟斤拷锟斤拷RegisterClass锟斤拷式锟斤拷注锟结，CHECKER3锟斤拷要锟斤拷锟斤拷锟接达拷锟斤拷稹５锟揭伙拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟轿拷锟紺hecker3锟斤拷锟斤拷锟节讹拷锟斤拷锟接达拷锟斤拷锟斤拷锟轿拷锟紺hecker3_Child锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷选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帧锟�

CHECKER3锟斤拷WinMain锟斤拷式锟斤拷注锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟阶拷锟斤拷瓿ｏ拷锟斤拷锟接达拷锟斤拷锟街拷幔珻HECKER3只锟角简单碉拷锟斤拷锟斤拷使锟斤拷wndclass锟结构锟叫的达拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟阶拷锟紺hecker3_Child锟斤拷锟斤拷锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟侥革拷锟斤拷位锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟借定为锟斤拷同锟斤拷值锟斤拷

pfnWndProc锟斤拷位锟借定为ChildWndProc锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷
锟斤拷
cbWndExtra锟斤拷位锟借定为4位元锟介，锟斤拷锟竭革拷确锟叫碉拷锟斤拷sizeof (long)锟斤拷锟斤拷锟斤拷位锟斤拷锟斤拷Windows锟斤拷锟斤拷为锟斤拷锟捷达拷锟接达拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟节诧拷锟结构锟叫ｏ拷预锟斤拷锟斤拷4位元锟斤拷锟斤拷锟侥空间。锟斤拷锟斤拷使锟矫此空硷拷锟斤拷锟斤拷锟斤拷每锟斤拷锟接达拷锟侥匡拷锟斤拷锟斤拷锟斤拷锟斤拷同锟斤拷锟斤拷讯锟斤拷
锟斤拷
锟斤拷为锟斤拷CHECKER3锟叫碉拷锟斤拷锟接达拷锟斤拷锟斤拷要图示锟斤拷锟斤拷锟斤拷hIcon锟斤拷位锟借定为NULL 锟斤拷
锟斤拷
pszClassName锟斤拷位锟借定为锟斤拷Checker3_Child锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟狡★拷
锟斤拷

通锟斤拷锟斤拷锟斤拷WinMain锟叫ｏ拷CreateWindow锟斤拷锟叫斤拷锟斤拷锟斤拷锟斤拷Checker3锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷然锟斤拷锟斤拷锟斤拷WndProc锟秸碉拷WM_CREATE讯息锟结，锟斤拷锟斤拷锟斤拷CreateWindow 25锟斤拷锟皆斤拷锟斤拷25锟斤拷Checker3_Child锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷7-3锟斤拷锟斤拷WinMain锟斤拷CreateWindow锟斤拷锟叫的诧拷锟斤拷锟斤拷锟斤拷锟节斤拷锟斤拷25锟斤拷锟斤拷锟接达拷锟斤拷WndProc锟斤拷CreateWindow锟斤拷锟叫的诧拷锟斤拷锟斤拷谋冉稀锟�

锟斤拷7-3

锟斤拷锟斤拷	锟斤拷锟接达拷	锟斤拷锟接达拷
锟接达拷锟斤拷锟�	锟斤拷Checker3锟斤拷	锟斤拷Checker3_Child锟斤拷
锟接达拷锟斤拷锟斤拷	锟斤拷Checker3...锟斤拷	NULL
锟接达拷锟斤拷式	WS_OVERLAPPEDWINDOW	WS_CHILDWINDOW \| WS_VISIBLE
水平位锟斤拷	CW_USEDEFAULT	0
锟斤拷直位锟斤拷	CW_USEDEFAULT	0
锟斤拷锟斤拷	CW_USEDEFAULT	0
锟竭讹拷	CW_USEDEFAULT	0
锟斤拷锟接达拷锟斤拷锟斤拷	NULL	hwnd
锟斤拷锟杰憋拷锟斤拷锟斤拷/锟斤拷ID	NULL	(HMENU) (y << 8 \| x)
执锟斤拷实锟斤拷锟斤拷锟�	hInstance	(HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE)
锟斤拷锟斤拷锟斤拷锟�	NULL	NULL

一锟斤拷锟斤拷锟斤拷拢锟斤拷锟斤拷哟锟揭拷锟斤拷泄锟轿伙拷煤痛锟叫★拷牟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟紺HECKER3锟叫碉拷锟斤拷锟接达拷锟斤拷WndProc确锟斤拷位锟矫和达拷小锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟斤拷歉锟斤拷哟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷母锟斤拷哟锟斤拷锟斤拷锟斤拷锟絅ULL锟斤拷锟斤拷使锟斤拷CreateWindow锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟接达拷时锟斤拷锟斤拷锟斤拷要锟斤拷锟接达拷锟斤拷锟斤拷锟剿★拷

锟斤拷锟接达拷没锟叫癸拷锟杰憋拷锟斤拷锟斤拷瞬锟斤拷锟斤拷锟絅ULL锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟酵伙拷玫牟锟斤拷锟斤拷锟轿拷锟絀D锟斤拷锟斤拷锟斤拷锟接达拷ID锟斤拷锟斤拷锟斤拷锟斤拷唯一锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟街★拷锟斤拷锟斤拷锟斤拷锟节碉拷十一锟铰斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟节达拷锟斤拷锟皆伙拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷锟絀D锟皆得革拷为锟斤拷要锟斤拷锟斤拷锟紺HECKER3锟斤拷说锟斤拷锟斤拷只锟角简单地斤拷锟斤拷ID锟借定为一锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷值锟斤拷每锟斤拷锟斤拷锟接达拷锟斤拷5锟斤拷5锟斤拷锟斤拷锟接达拷锟叫碉拷x锟斤拷y位锟矫碉拷锟斤拷稀锟�

CreateWindow锟斤拷式锟斤拷要一锟斤拷执锟斤拷实锟斤拷锟斤拷拧锟斤拷锟絎inMain锟叫ｏ拷执锟斤拷实锟斤拷锟斤拷趴锟斤拷院锟斤拷锟斤拷椎锟饺★拷茫锟斤拷锟轿拷锟斤拷锟絎inMain锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟节斤拷锟斤拷锟斤拷锟接达拷时锟斤拷 CHECKER3锟斤拷锟斤拷锟斤拷GetWindowLong锟斤拷锟斤拷Windows为锟接达拷锟斤拷锟斤拷锟侥结构锟斤拷取锟斤拷hInstance值锟斤拷锟斤拷锟斤拷GetWindowLong锟斤拷锟斤拷也锟杰斤拷hInstance锟斤拷值锟斤拷锟芥到锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街憋拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟�

每一锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷hwndChild锟斤拷锟斤拷锟叫憋拷锟斤拷锟剿诧拷同锟斤拷锟接达拷锟斤拷锟脚★拷锟斤拷WndProc锟斤拷锟秸碉拷一锟斤拷WM_SIZE讯息锟结，锟斤拷锟斤拷为锟斤拷25锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷MoveWindow锟斤拷MoveWindow锟侥诧拷锟斤拷锟斤拷示锟斤拷锟接达拷锟斤拷锟较斤拷锟斤拷锟届陡锟斤拷哟锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟疥、锟斤拷锟接达拷锟侥匡拷锟饺和高讹拷锟皆硷拷锟斤拷锟接达拷锟角凤拷锟斤拷要锟截伙拷锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟角匡拷一锟斤拷ChildWndProc锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式为锟斤拷锟斤拷锟斤拷25锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷讯息锟斤拷ChildWndProc锟斤拷hwnd锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷讯息锟侥达拷锟脚★拷锟斤拷ChildWndProc锟斤拷锟斤拷WM_CREATE讯息时锟斤拷锟斤拷为锟斤拷25锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷25锟轿ｏ拷锟斤拷锟斤拷锟斤拷SetWindowWord锟斤拷锟接达拷锟结构锟斤拷锟斤拷锟侥讹拷锟斤拷锟斤拷锟斤拷锟叫达拷锟斤拷一锟斤拷0值锟斤拷通锟斤拷锟节讹拷锟斤拷锟接达拷锟斤拷锟绞笔癸拷玫锟絚bWndExtra锟斤拷锟斤拷锟斤拷锟侥空间）锟斤拷ChildWndProc锟矫达拷值锟斤拷锟街革拷目前锟斤拷锟轿碉拷状态锟斤拷锟斤拷X锟斤拷没锟斤拷X锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟叫碉拷锟斤拷时锟斤拷WM_LBUTTONDOWN锟斤拷锟斤拷锟斤拷式锟津单碉拷锟睫革拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟�0锟斤拷1锟斤拷锟斤拷锟�1锟斤拷0锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷效锟斤拷锟斤拷锟斤拷锟斤拷锟角憋拷锟斤拷锟斤拷锟侥撅拷锟轿★拷WM_PAINT锟侥达拷锟斤拷锟杰简单ｏ拷锟斤拷为锟斤拷锟斤拷锟斤拷锟狡的撅拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷一锟斤拷锟斤拷

锟斤拷为CHECKER3锟斤拷C原始锟诫档锟斤拷锟斤拷.EXE锟斤拷锟斤拷锟斤拷CHECKER1锟侥大（革拷锟斤拷锟斤拷说锟斤拷式锟斤拷说锟斤拷锟剿ｏ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说CHECKER3锟斤拷CHECKER1锟斤拷锟津单★拷锟斤拷锟斤拷注锟解，锟斤拷锟斤拷没锟斤拷锟斤拷锟轿何的伙拷锟斤拷锟斤拷锟叫诧拷锟皆ｏ拷锟斤拷锟斤拷锟斤拷要锟侥ｏ拷锟斤拷锟斤拷知锟斤拷CHECKER3锟斤拷锟角凤拷锟叫革拷锟斤拷锟接达拷锟矫碉拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷WM_LBUTTONDOWN讯息锟斤拷

锟斤拷锟接达拷锟酵硷拷锟斤拷
锟斤拷

为CHECKER3锟斤拷锟接硷拷锟教斤拷锟斤拷锟斤拷锟紺HECKER系锟叫癸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斤拷锟斤拷锟斤拷锟斤拷锟斤拷时锟津，匡拷锟斤拷锟叫革拷锟绞碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷CHECKER2锟叫ｏ拷锟斤拷锟斤拷锟轿憋拷锟轿伙拷镁锟斤拷锟斤拷锟斤拷锟絊pacebar锟斤拷时锟侥革拷锟斤拷锟津将伙拷帽锟角凤拷锟脚★拷锟斤拷锟斤拷锟角达拷锟斤拷锟斤拷锟接达拷时锟斤拷锟斤拷锟斤拷锟杰从对伙拷锟斤拷锟介功锟斤拷锟叫伙拷锟斤拷锟绞撅拷锟斤拷诙曰锟斤拷锟斤拷锟斤拷校锟斤拷锟斤拷锟斤拷锟剿革拷牟锟斤拷锟斤拷锟脚伙拷慊拷木锟斤拷蔚锟斤拷锟斤拷哟锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷虢癸拷悖拷锟饺灰诧拷锟斤拷锟斤拷眉锟斤拷探锟斤拷卸锟轿伙拷锟斤拷锟�

锟斤拷锟角诧拷锟斤拷要锟斤拷Windows锟节诧拷锟斤拷锟叫的对伙拷锟斤拷锟介处锟斤拷锟斤拷式锟斤拷锟斤拷写锟斤拷锟斤拷锟斤拷只锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷应锟斤拷锟斤拷锟斤拷锟接︼拷贸锟绞斤拷锟侥ｏ拷锟皆伙拷锟斤拷锟介。锟叫撅拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟结发锟斤拷锟斤拷锟斤拷一锟斤拷锟铰ｏ拷锟斤拷锟接达拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷要锟斤拷锟斤拷同锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷Spacebar锟斤拷锟斤拷Enter锟斤拷时锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷选锟斤拷恰锟斤拷锟斤拷路锟斤拷锟斤拷时锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟接达拷之锟斤拷锟狡讹拷锟斤拷锟诫焦锟姐。实锟斤拷锟较ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟较碉拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟叫╋拷锟斤拷樱锟斤拷锟绞憋拷歉锟斤拷哟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诫焦锟姐。

CHECKER4.C锟斤拷锟绞�7-5锟斤拷示锟斤拷

 锟斤拷式7-5  CHECKER4
CHECKER4.C
/*---------------------------------------------------------------------------
   CHECKER4.C -- 	Mouse Hit-Test Demo Program No. 4
 						(c) Charles Petzold, 1998
---------------------------------------------------------------------------*/

#include <windows.h>
#define DIVISIONS 5

LRESULT CALLBACK WndProc   (HWND, UINT, WPARAM, LPARAM) ;
LRESULT CALLBACK ChildWndProc (HWND, UINT, WPARAM, LPARAM) ;
int   idFocus = 0 ;
TCHAR szChildClass[] = TEXT ("Checker4_Child") ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    						PSTR szCmdLine, int iCmdShow)
{
     	static TCHAR 	szAppName[] = TEXT ("Checker4") ;
     	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 ;
     	}
     
     	wndclass.lpfnWndProc   				= ChildWndProc ;
     	wndclass.cbWndExtra    				= sizeof (long) ;
     	wndclass.hIcon         				= NULL ;
     	wndclass.lpszClassName 			= szChildClass ;
     
     	RegisterClass (&wndclass) ;
     	hwnd = CreateWindow (	szAppName, TEXT ("Checker4 Mouse Hit-Test Demo"),
                        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 HWND 	hwndChild[DIVISIONS][DIVISIONS] ;
     	int    				cxBlock, cyBlock, x, y ;
     
     	switch (message)
     	{
     	case WM_CREATE :
          		for (x = 0 ; x < DIVISIONS ; x++)
               				for (y = 0 ; y < DIVISIONS ; y++)
              hwndChild[x][y] = CreateWindow (szChildClass, NULL,
                          WS_CHILDWINDOW | WS_VISIBLE,
                          0, 0, 0, 0,
                          hwnd, (HMENU) (y << 8 | x),
                          HINSTANCE) GetWindowLong (hwnd, GWL_HINSTANCE),
                              			NULL) ;
          		return 0 ;
     	case 	WM_SIZE :
          		cxBlock = LOWORD (lParam) / DIVISIONS ;
          		cyBlock = HIWORD (lParam) / DIVISIONS ;
          
          		for (x = 0 ; x < DIVISIONS ; x++)
                				for (y = 0 ; y < DIVISIONS ; y++)
                    		MoveWindow (	hwndChild[x][y],
                             x * cxBlock, y * cyBlock,
                                 cxBlock, cyBlock, TRUE) ;
          		return 0 ;
                       
     	case 	WM_LBUTTONDOWN :
          		MessageBeep (0) ;
          		return 0 ;

          		// On set-focus message, set focus to child window
     	case 	WM_SETFOCUS:
          		SetFocus (GetDlgItem (hwnd, idFocus)) ;
          		return 0 ;

		// On key-down message, possibly change the focus window

     	case 	WM_KEYDOWN:
          		x = idFocus & 0xFF ;
          		y = idFocus >> 8 ;

         		switch (wParam)
          		{
        case VK_UP:             y-- ;  							break ;
		case VK_DOWN:  			y++ ;  							break ;
		case VK_LEFT:  			x-- ;       					break ;
        case VK_RIGHT: 		    x++ ;                    	    break ;
        case VK_HOME:  			x = y = 0 ;              		break ;
        case VK_END:   			x = y = DIVISIONS - 1 ;  	    break ;
          		default:     					return 0 ;
          		}

          		x = (x + DIVISIONS) % DIVISIONS ;
          		y = (y + DIVISIONS) % DIVISIONS ;

          		idFocus = y << 8 | x ;

          		SetFocus (GetDlgItem (hwnd, idFocus)) ;
          		return 0 ;

     	case 	WM_DESTROY :
          		PostQuitMessage (0) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

LRESULT CALLBACK ChildWndProc (HWND hwnd, UINT message, 
                   WPARAM wParam, LPARAM lParam)
{
     	HDC         					hdc ;
     	PAINTSTRUCT 			        ps ;
     	RECT        					rect ;
     
 	switch (message)
     {
     	case 	WM_CREATE :
          		SetWindowLong (hwnd, 0, 0) ;       // on/off flag
          		return 0 ;

     	case 	WM_KEYDOWN:
               			// Send most key presses to the parent window
          
          		if (wParam != VK_RETURN && wParam != VK_SPACE)
          		{
               		SendMessage (GetParent (hwnd), message, wParam, lParam) ;
               		return 0 ;
          		}
               			// For Return and Space, fall through to toggle the square
          
     	case 	WM_LBUTTONDOWN :
          		SetWindowLong (hwnd, 0, 1 ^ GetWindowLong (hwnd, 0)) ;
          		SetFocus (hwnd) ;
          		InvalidateRect (hwnd, NULL, FALSE) ;
          		return 0 ;

               	// For focus messages, invalidate the window for repaint
          
     	case 	WM_SETFOCUS:
          		idFocus = GetWindowLong (hwnd, GWL_ID) ;

               	// Fall through

     	case 	WM_KILLFOCUS:
          		InvalidateRect (hwnd, NULL, TRUE) ;
          		return 0 ;
          
	    case 	WM_PAINT :
          		hdc = BeginPaint (hwnd, &ps) ;
          
          		GetClientRect (hwnd, &rect) ;
          		Rectangle (hdc, 0, 0, rect.right, rect.bottom) ;

               			// Draw the "x" mark
          
          		if (GetWindowLong (hwnd, 0))
          		{
               			MoveToEx (hdc, 0,          0, NULL) ;
               			LineTo   (hdc, rect.right, rect.bottom) ;
               			MoveToEx (hdc, 0,          rect.bottom, NULL) ;
               			LineTo   (hdc, rect.right, 0) ;
          		}
               			// Draw the "focus" rectangle
          
          		if (hwnd == GetFocus ())
          		{
               			rect.left   += rect.right / 10 ;
               			rect.right  -= rect.left ;
               			rect.top    += rect.bottom / 10 ;
               			rect.bottom -= rect.top ;

               			SelectObject (hdc, GetStockObject (NULL_BRUSH)) ;
               			SelectObject (hdc, CreatePen (PS_DASH, 0, 0)) ;
               			Rectangle (hdc, rect.left, rect.top, rect.right, rect.bottom) ;
               			DeleteObject (SelectObject (hdc, GetStockObject (BLACK_PEN))) ;
          		}

          		EndPaint (hwnd, &ps) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

锟斤拷应锟斤拷锟杰伙拷锟斤拷锟斤拷每一锟斤拷锟斤拷锟接达拷锟斤拷唯一锟斤拷锟斤拷锟接达拷ID锟斤拷锟斤拷ID锟节猴拷锟斤拷CreateWindow锟斤拷锟斤拷锟接达拷时锟斤拷锟藉。锟斤拷CHECKER3锟叫ｏ拷锟斤拷ID锟角撅拷锟轿碉拷x锟斤拷y位锟矫碉拷锟斤拷稀锟揭伙拷锟斤拷锟绞斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟侥猴拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷囟锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷哟锟絀D锟斤拷

idChild = GetWindowLong (hwndChild, GWL_ID) ;

锟斤拷锟斤拷暮锟绞揭诧拷锟酵拷锟斤拷墓锟斤拷埽锟�

idChild = GetDlgCtrlID (hwndChild) ;

锟斤拷锟界函式锟斤拷锟斤拷锟斤拷锟斤拷示锟侥ｏ拷锟斤拷锟斤拷要锟斤拷於对伙拷锟斤拷锟斤拷涂锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷锟斤拷知锟斤拷锟斤拷锟接达拷锟侥达拷锟脚猴拷锟斤拷锟接达拷ID锟斤拷锟剿猴拷式也锟斤拷锟皆伙拷锟斤拷锟斤拷哟锟斤拷拇锟斤拷牛锟�

hwndChild = GetDlgItem (hwndParent, idChild) ;

锟斤拷CHECKER4锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟絠dFocus锟斤拷於憋拷锟斤拷目前锟斤拷锟诫焦锟斤拷锟接达拷锟斤拷锟斤拷锟接达拷ID锟斤拷锟斤拷锟斤拷前锟斤拷说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芥单锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟角诧拷锟斤拷锟皆讹拷锟斤拷锟斤拷锟斤拷虢癸拷恪ｏ拷锟剿ｏ拷CHECKER4锟叫的革拷锟接达拷锟斤拷通锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷暮锟绞斤拷锟斤拷锟斤拷锟絎M_SETFOCUS讯息锟斤拷

SetFocus (GetDlgItem (hwnd, idFocus)) ;

锟斤拷锟斤拷锟借定一锟斤拷锟斤拷锟接达拷为锟斤拷锟诫焦锟姐。

ChildWndProc锟斤拷锟斤拷WM_SETFOCUS锟斤拷WM_KILLFOCUS讯息锟斤拷锟斤拷锟絎M_SETFOCUS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絠dFocus锟叫斤拷锟斤拷锟斤拷锟诫焦锟斤拷锟斤拷锟斤拷哟锟絀D锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷哟锟斤拷锟斤拷锟叫э拷模锟斤拷锟斤拷锟斤拷锟揭伙拷锟絎M_PAINT讯息锟斤拷锟斤拷锟絎M_PAINT讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟诫焦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絇S_DASH锟斤拷锟绞的凤拷锟揭伙拷锟斤拷锟斤拷锟斤拷员锟绞撅拷锟斤拷哟锟斤拷锟斤拷锟斤拷虢癸拷恪�

ChildWndProc也锟斤拷锟斤拷WM_KEYDOWN讯息锟斤拷锟斤拷於筹拷锟斤拷Spacebar锟斤拷Enter锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖断拷锟絎M_KEYDOWN锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟解，锟接达拷讯息锟斤拷锟斤拷锟斤拷式也锟斤拷锟斤拷锟斤拷锟斤拷WM_LBUTTONDOWN讯息锟斤拷讯息锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟角革拷锟接达拷锟斤拷锟斤拷锟介。锟节凤拷锟斤拷锟斤拷频锟紺HECKER2锟叫ｏ拷锟剿筹拷式锟缴伙拷锟斤拷锟斤拷锟斤拷虢癸拷锟斤拷锟斤拷锟接达拷锟斤拷x锟斤拷y锟斤拷锟疥，锟斤拷锟斤拷锟捷帮拷锟铰碉拷锟截讹拷锟斤拷锟斤拷锟斤拷锟斤拷谋锟斤拷锟斤拷恰锟饺伙拷锟酵拷锟斤拷锟斤拷锟絊etFocus锟斤拷锟斤拷锟诫焦锟斤拷锟借定锟斤拷锟铰碉拷锟斤拷锟接达拷锟斤拷

锟斤拷锟截伙拷锟斤拷
锟斤拷

一锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式通锟斤拷只锟节伙拷锟斤拷锟轿憋拷位锟斤拷哟锟斤拷锟斤拷锟绞撅拷锟斤拷颍锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷时锟脚斤拷锟秸伙拷锟斤拷讯息锟斤拷一锟斤拷锟斤拷式也锟斤拷锟斤拷锟斤拷要锟节伙拷锟斤拷位锟斤拷哟锟斤拷锟绞憋拷锟斤拷栈锟斤拷锟窖断拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷锟截★拷锟斤拷锟襟。憋拷锟铰ｏ拷锟斤拷么锟斤拷没什么锟斤拷锟剿的★拷

锟斤拷凭锟斤拷锟�
锟斤拷

为锟斤拷说锟斤拷锟斤拷锟截伙拷锟斤拷谋锟揭拷裕锟斤拷锟斤拷锟斤拷锟斤拷强锟揭伙拷锟紹LOKOUT1锟斤拷式锟斤拷锟斤拷锟绞�7-6锟斤拷示锟斤拷锟斤拷锟剿筹拷式锟斤拷锟斤拷锟斤拷锟斤到锟斤拷一锟斤拷锟侥癸拷锟杰ｏ拷锟斤拷锟斤拷却锟斤拷十锟斤拷锟斤拷锟截碉拷缺锟捷★拷

 锟斤拷式7-6  BLOKOUT1
BLOKOUT1.C
/*----------------------------------------------------------------------------
   BLOKOUT1.C -- 	Mouse Button Demo 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 ("BlokOut1") ;
     	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 ("Mouse Button Demo"),
                     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 DrawBoxOutline (HWND hwnd, POINT ptBeg, POINT ptEnd)
{
     	HDC hdc ;
     	hdc = GetDC (hwnd) ;
     	SetROP2 (hdc, R2_NOT) ;
     	SelectObject (hdc, GetStockObject (NULL_BRUSH)) ;
     	Rectangle (hdc, ptBeg.x, ptBeg.y, ptEnd.x, ptEnd.y) ;
     
     	ReleaseDC (hwnd, hdc) ;
}
LRESULT CALLBACK WndProc (	HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
     	static BOOL 	fBlocking, fValidBox ;
     	static POINT	ptBeg, ptEnd, ptBoxBeg, ptBoxEnd ;
     	HDC     				hdc ;
     	PAINTSTRUCT  ps ;
     	switch (message)
     	{
     	case 	WM_LBUTTONDOWN :
          		ptBeg.x = ptEnd.x = LOWORD (lParam) ;
          		ptBeg.y = ptEnd.y = HIWORD (lParam) ;
          
          		DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
          
          		SetCursor (LoadCursor (NULL, IDC_CROSS)) ;
          
          		fBlocking = TRUE ;
          		return 0 ;

     	case 	WM_MOUSEMOVE :
          		if (fBlocking)
          		{
               			SetCursor (LoadCursor (NULL, IDC_CROSS)) ;
               
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
               
               			ptEnd.x = LOWORD (lParam) ;
               			ptEnd.y = HIWORD (lParam) ;
               
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
          		}
          		return 0 ;
          
     	case 	WM_LBUTTONUP :
          		if (fBlocking)
          		{
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
               
               			ptBoxBeg   				= ptBeg ;
               			ptBoxEnd.x 				= LOWORD (lParam) ;
               			ptBoxEnd.y 				= HIWORD (lParam) ;
               
               			SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
               			fBlocking 				= FALSE ;
               			fValidBox  				= TRUE ;
               
               			InvalidateRect (hwnd, NULL, TRUE) ;
          		}
          		return 0 ;
          
     	case 	WM_CHAR :
          		if (fBlocking & wParam == '\x1B')       // i.e., Escape
          		{
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
               
               			SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
               
               			fBlocking = FALSE ;
          		}
          		return 0 ;

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

    		if (fValidBox)
          		{
               				SelectObject (hdc, GetStockObject (BLACK_BRUSH)) ;
               				Rectangle 	(	hdc, ptBoxBeg.x, ptBoxBeg.y,
                    									ptBoxEnd.x, ptBoxEnd.y) ;
          		}
          
     		if (fBlocking)
          		{
               			SetROP2 (hdc, R2_NOT) ;
               			SelectObject (hdc, GetStockObject (NULL_BRUSH)) ;
               			Rectangle (hdc, ptBeg.x, ptBeg.y, ptEnd.x, ptEnd.y) ;
          		}
          
          		EndPaint (hwnd, &ps) ;
          		return 0 ;

     	case 	WM_DESTROY :
          		PostQuitMessage (0) ;
          		return 0 ;
     }
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

锟剿筹拷式展示锟斤拷一些锟斤拷锟斤拷锟斤拷锟斤拷实锟斤拷锟斤拷Windows锟侥★拷锟斤拷图锟斤拷锟斤拷式锟叫的讹拷锟斤拷锟斤拷锟缴帮拷锟铰伙拷锟斤拷锟斤拷锟斤拷锟绞既凤拷锟斤拷锟斤拷蔚锟揭伙拷牵锟饺伙拷锟斤拷隙锟斤拷锟斤拷蟆３锟绞斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷蔚锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟斤拷锟角伙拷锟斤拷目前锟斤拷位锟矫★拷锟斤拷锟斤拷锟酵放伙拷锟斤拷锟结，锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷巍锟酵�7-4锟斤拷示锟斤拷一锟斤拷锟窖撅拷锟斤拷锟斤拷木锟斤拷魏锟斤拷锟揭伙拷锟斤拷锟斤拷诨锟斤拷木锟斤拷巍锟�

锟斤拷

图7-4 BLOKOUT1锟斤拷萤幕锟斤拷示

锟斤拷么锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟截ｏ拷

锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷牟锟斤拷锟斤拷锟斤拷锟紹LOKOUT1锟斤拷锟斤拷示锟斤拷锟斤拷锟铰伙拷锟斤拷锟斤拷锟斤拷锟斤拷然锟结将锟轿憋拷锟狡筹拷锟接达拷锟斤拷锟斤拷式锟斤拷停止锟斤拷锟斤拷WM_MOUSEMOVE讯息锟斤拷锟斤拷锟斤拷锟酵放帮拷钮锟斤拷BLOKOUT1锟斤拷锟斤拷锟劫伙拷锟絎M_BUTTONUP讯息锟斤拷锟斤拷为锟轿憋拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟解。然锟结将锟轿憋拷锟狡伙拷BLOKOUT1锟斤拷锟斤拷示锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷然锟斤拷为锟斤拷钮锟斤拷於帮拷锟斤拷状态锟斤拷

锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫ｏ拷锟斤拷为锟斤拷式锟斤拷知锟斤拷锟斤拷锟斤拷锟斤拷什么锟斤拷锟介。

锟斤拷锟截的斤拷锟斤拷锟斤拷锟�
锟斤拷

BLOKOUT1锟斤拷示锟斤拷一些锟斤拷锟斤拷锟侥筹拷式锟斤拷锟杰ｏ拷锟斤拷锟斤拷锟侥筹拷式锟斤拷锟斤拷然锟斤拷缺锟捷★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭癸拷没锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷愿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曳锟斤拷锟斤拷锟斤拷么锟斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷诒锟斤拷铣锟斤拷哟锟绞庇︼拷锟矫伙拷锟绞裁达拷锟斤拷锟斤拷猓拷锟绞接︼拷锟斤拷锟饺伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟�

锟斤拷锟截伙拷锟斤拷要锟饺凤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭恍╋拷锟斤拷锟街灰拷锟斤拷校锟�

SetCapture (hwnd) ;

锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟街拷幔琖indows锟斤拷锟斤拷锟叫伙拷锟斤拷讯息锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷为hwnd锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷之锟斤拷锟秸碉拷锟斤拷锟斤拷讯息锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷讯息锟斤拷锟斤拷态锟斤拷锟街ｏ拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟接达拷锟侥凤拷锟斤拷示锟斤拷锟斤拷lParam锟斤拷锟斤拷锟斤拷指示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叫碉拷位锟矫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷呋锟斤拷锟斤拷戏锟绞憋拷锟斤拷锟叫﹛锟斤拷y锟斤拷锟斤拷锟斤拷锟斤拷歉锟斤拷摹锟斤拷锟斤拷锟斤拷锟斤拷头呕锟斤拷锟绞憋拷锟斤拷锟斤拷校锟�

ReleaseCapture () ;

锟接讹拷使锟斤拷锟斤拷锟街革拷锟斤拷锟斤拷锟斤拷

锟斤拷32位元锟斤拷Windows锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷前锟斤拷Windows锟芥本锟斤拷锟叫讹拷一些锟斤拷锟狡★拷锟截憋拷锟角ｏ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蟀醇锟侥壳帮拷锟轿达拷锟斤拷锟斤拷拢锟斤拷锟斤拷一锟斤拷锟斤拷伪锟斤拷频锟斤拷锟斤拷锟揭伙拷锟斤拷哟锟斤拷希锟斤拷锟矫达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷鼗锟斤拷锟斤拷锟角革拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿憋拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷栈锟斤拷锟窖断拷锟斤拷锟届斗锟街挂伙拷锟斤拷锟绞斤拷锟斤拷锟斤拷鼗锟斤拷锟街拷岵伙拷头锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟较低筹拷幕锟斤拷遥锟斤拷锟斤拷潜锟揭拷摹锟�

锟斤拷锟戒话说锟斤拷只锟叫碉拷锟斤拷锟襟按硷拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫憋拷锟斤拷锟斤拷时锟斤拷锟斤拷锟截伙拷锟襟；碉拷锟斤拷锟襟按硷拷锟斤拷锟酵凤拷时锟斤拷锟斤拷锟酵放伙拷锟斤拷锟斤拷锟截★拷

BLOKOUT2锟斤拷式
锟斤拷

展示锟斤拷锟斤拷锟斤拷锟截碉拷BLOKOUT2锟斤拷式锟斤拷锟绞�7-7锟斤拷示锟斤拷

 锟斤拷式7-7  BLOKOUT2
BLOKOUT2.C
/*----------------------------------------------------------------------------
   	BLOKOUT2.C -- 		Mouse Button & Capture Demo 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 ("BlokOut2") ;
     	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 ("Mouse Button & Capture Demo"),
					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 DrawBoxOutline (HWND hwnd, POINT ptBeg, POINT ptEnd)
{
     	HDC hdc ;
     	hdc = GetDC (hwnd) ;
     	SetROP2 (hdc, R2_NOT) ;
     	SelectObject (hdc, GetStockObject (NULL_BRUSH)) ;
     	Rectangle (hdc, ptBeg.x, ptBeg.y, ptEnd.x, ptEnd.y) ;
     
     	ReleaseDC (hwnd, hdc) ;
}

LRESULT CALLBACK WndProc (	HWND hwnd, UINT message, WPARAM wParam,LPARAM lParam)
{
     	static BOOL  fBlocking, fValidBox ;
     	static POINT ptBeg, ptEnd, ptBoxBeg, ptBoxEnd ;
     	HDC          hdc ;
     	PAINTSTRUCT  ps ;
     
     	switch (message)
     	{
     	case 	WM_LBUTTONDOWN :
          		ptBeg.x = ptEnd.x = LOWORD (lParam) ;
          		ptBeg.y = ptEnd.y = HIWORD (lParam) ;
          
          		DrawBoxOutline (hwnd, ptBeg, ptEnd) ;

          		SetCapture (hwnd) ;
          		SetCursor (LoadCursor (NULL, IDC_CROSS)) ;
          
          		fBlocking = TRUE ;
          		return 0 ;
          
     	case 	WM_MOUSEMOVE :
          		if (fBlocking)
          		{
               			SetCursor (LoadCursor (NULL, IDC_CROSS)) ;
               
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
               
               			ptEnd.x = LOWORD (lParam) ;
               			ptEnd.y = HIWORD (lParam) ;
               
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
          		}
        		return 0 ;
          
     	case 	WM_LBUTTONUP :
          		if (fBlocking)
          		{
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
               
               			ptBoxBeg   			= ptBeg ;
               			ptBoxEnd.x 			= LOWORD (lParam) ;
               			ptBoxEnd.y 			= HIWORD (lParam) ;
               
               			ReleaseCapture () ;
               			SetCursor (LoadCursor (NULL, IDC_ARROW)) ;
               
               			fBlocking 			= FALSE ;
               			fValidBox  			= TRUE ;
               
               			InvalidateRect (hwnd, NULL, TRUE) ;
          		}
          		return 0 ;
          
     	case 	WM_CHAR :
          		if (fBlocking & wParam == '\x1B')       // i.e., Escape
          		{
               			DrawBoxOutline (hwnd, ptBeg, ptEnd) ;
               			ReleaseCapture () ;
               			SetCursor (LoadCursor (NULL, IDC_ARROW)) ;

               			fBlocking = FALSE ;
          		}
          		return 0 ;
          
     	case 	WM_PAINT :
          		hdc = BeginPaint (hwnd, &ps) ;
          
          		if (fValidBox)
          {
               			SelectObject (hdc, GetStockObject (BLACK_BRUSH)) ;
               			Rectangle (hdc, ptBoxBeg.x, ptBoxBeg.y,
                    			ptBoxEnd.x, ptBoxEnd.y) ;
          		}
          
          			if (fBlocking)
          		{
               			SetROP2 (hdc, R2_NOT) ;
               			SelectObject (hdc, GetStockObject (NULL_BRUSH)) ;
               			Rectangle (hdc, ptBeg.x, ptBeg.y, ptEnd.x, ptEnd.y) ;
          		}
          
          		EndPaint (hwnd, &ps) ;
          		return 0 ;
          
     	case 	WM_DESTROY :
          		PostQuitMessage (0) ;
          		return 0 ;
     	}
     	return DefWindowProc (hwnd, message, wParam, lParam) ;
}

BLOKOUT2锟斤拷式锟斤拷BLOKOUT1锟斤拷式一锟斤拷锟斤拷只锟角讹拷锟斤拷锟斤拷锟斤拷锟铰筹拷式锟诫：锟斤拷WM_LBUTTONDOWN讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟絊etCapture锟斤拷锟斤拷锟斤拷WM_LBUTTONDOWN锟斤拷WM_CHAR讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟絉eleaseCapture锟斤拷锟斤拷榛拷锟斤拷哟锟斤拷锟绞癸拷哟锟叫★拷萤幕锟斤拷小锟斤拷锟斤拷始锟斤拷锟斤拷示锟斤拷锟津画筹拷一锟斤拷锟斤拷危锟饺伙拷峤拷锟斤拷锟斤拷伪锟斤拷瞥锟斤拷锟绞撅拷锟斤拷锟斤拷锟揭边伙拷锟铰边ｏ拷锟斤拷锟斤拷锟酵放伙拷锟襟按硷拷锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷蔚锟斤拷锟斤拷辍ｏ拷锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷哟锟斤拷锟斤拷芸锟斤拷锟斤拷锟斤拷锟斤拷

锟斤拷锟截伙拷锟襟并凤拷只锟斤拷锟斤拷锟斤拷锟叫╋拷殴值锟接︼拷贸锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟襟按硷拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷时锟斤拷锟杰癸拷追锟斤拷WM_MOUSEMOVE讯息锟斤拷锟斤拷直锟斤拷锟斤拷锟襟按硷拷锟斤拷锟酵凤拷为止锟斤拷锟斤拷么锟斤拷锟斤拷应锟斤拷锟斤拷锟截伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥筹拷式锟斤拷同时锟街凤拷锟斤拷使锟斤拷锟竭碉拷锟斤拷锟斤拷锟斤拷

锟斤拷锟斤拷锟斤拷
锟斤拷

锟诫传统锟侥伙拷锟斤拷锟斤拷龋锟組icrosoft IntelliMouse锟斤拷锟截碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷锟揭伙拷锟叫★拷锟斤拷帧锟斤拷锟斤拷锟斤拷园锟斤拷锟斤拷锟斤拷锟斤拷锟街ｏ拷锟斤拷时锟斤拷锟侥癸拷锟斤拷锟洁当於伙拷锟襟按硷拷锟斤拷锟叫硷拷锟斤拷锟斤拷锟斤拷锟斤拷也锟斤拷锟斤拷锟斤拷食指锟斤拷转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窖断拷锟斤拷锟斤拷锟絎M_MOUSEWHEEL锟斤拷使锟矫伙拷锟斤拷锟街的筹拷式通锟斤拷锟斤拷锟斤拷锟斤拷糯锟斤拷募锟斤拷锟斤拷锟接︼拷锟窖断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要锟斤拷锟斤拷锟截伙拷锟截ｏ拷锟斤拷锟揭憋拷锟斤拷锟斤拷希锟斤拷液芸锟斤拷习锟斤拷锟绞癸拷没锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟組icrosoft Word锟斤拷Microsoft Internet Explorer锟剿★拷

锟揭诧拷锟斤拷锟斤拷锟桔伙拷锟斤拷锟街碉拷锟斤拷锟斤拷使锟矫凤拷锟斤拷锟斤拷实锟斤拷锟较ｏ拷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叫的筹拷式锟斤拷锟斤拷锟斤拷锟绞絊YSMETS4锟斤拷锟斤拷锟斤拷锟接伙拷锟斤拷锟街达拷锟斤拷锟斤拷式锟斤拷锟皆憋拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫撅拷锟斤拷锟斤拷锟较★拷锟斤拷锟秸碉拷SYSMETS锟斤拷式锟斤拷锟绞�7-8锟斤拷示锟斤拷

 锟斤拷式7-8  SYSMETS4
SYSMETS.C
/*----------------------------------------------------------------------------
SYSMETS.C -- Final System Metrics Display Program 
					(c) Charles Petzold, 1998
----------------------------------------------------------------------------*/

#include <windows.h>
#include "sysmets.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                    						PSTR szCmdLine, int iCmdShow)
{
     	static TCHAR 	szAppName[] = TEXT ("SysMets") ;
     	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 ("Get System Metrics"),
                          	WS_OVERLAPPEDWINDOW | WS_VSCROLL | WS_HSCROLL,
                            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, cxClient, cyClient, iMaxWidth ;
	static 		int		iDeltaPerLine, iAccumDelta ; 		// for mouse wheel logic
     		HDC         hdc ;
     		int         i, x, y, iVertPos, iHorzPos, iPaintBeg, iPaintEnd ;
     		PAINTSTRUCT 		ps ;
     		SCROLLINFO  		si ;
     		TCHAR  				szBuffer[10] ;
     		TEXTMETRIC		tm ;
     		ULONG  				ulScrollLines ;   	// for mouse wheel logic
     	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) ;

               					// Save the width of the three columns
          
       		iMaxWidth = 40 * cxChar + 22 * cxCaps ;

               					// Fall through for mouse wheel information

     	case 	WM_SETTINGCHANGE:
          		SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &ulScrollLines, 0) ;
          	
			// ulScrollLines usually equals 3 or 0 (for no scrolling)
			// WHEEL_DELTA equals 120, so iDeltaPerLine will be 40

          		if (ulScrollLines)
               				iDeltaPerLine = WHEEL_DELTA / ulScrollLines ;
          		else
               				iDeltaPerLine = 0 ;

		return 0 ;
          
     	case 	WM_SIZE:
          		cxClient = LOWORD (lParam) ;
   		cyClient = HIWORD (lParam) ;

               					// Set vertical scroll bar range and page size

          		si.cbSize 			    = sizeof (si) ;
          		si.fMask  				= SIF_RANGE | SIF_PAGE ;
          		si.nMin   				= 0 ;
          		si.nMax   				= NUMLINES - 1 ;
          		si.nPage  				= cyClient / cyChar ;
          		SetScrollInfo (hwnd, SB_VERT, &si, TRUE) ;

               					// Set horizontal scroll bar range and page size

          		si.cbSize 			    = sizeof (si) ;
          		si.fMask  				= SIF_RANGE | SIF_PAGE ;
         	 	si.nMin   				= 0 ;
          		si.nMax   				= 2 + iMaxWidth / cxChar ;
          		si.nPage  				= cxClient / cxChar ;
 		SetScrollInfo (hwnd, SB_HORZ, &si, TRUE) ;
          		return 0 ;
          
     	case WM_VSCROLL:
               					// Get all the vertical scroll bar information
          		si.cbSize = sizeof (si) ;
          		si.fMask  = SIF_ALL ;
          		GetScrollInfo (hwnd, SB_VERT, &si) ;

               					// Save the position for comparison later on
          		iVertPos = si.nPos ;
		switch (LOWORD (wParam))
          		{
          		case 	SB_TOP:
               				si.nPos = si.nMin ;
               				break ;
               
          		case 	SB_BOTTOM:
               				si.nPos = si.nMax ;
               				break ;
               
          		case SB_LINEUP:
               				si.nPos -= 1 ;
               				break ;
               
        		case 	SB_LINEDOWN:
               				si.nPos += 1 ;
               				break ;
               
          		case SB_PAGEUP:
               				si.nPos -= si.nPage ;
               				break ;
               
          		case 	SB_PAGEDOWN:
               				si.nPos += si.nPage ;
               				break ;
               
          		case 	SB_THUMBTRACK:
               				si.nPos = si.nTrackPos ;
               				break ;
          		default:
               				break ;         
          		}
               				// Set the position and then retrieve it.  Due to adjustments
				//   by Windows it may not be the same as the value set.

          		si.fMask = SIF_POS ;
          		SetScrollInfo (hwnd, SB_VERT, &si, TRUE) ;
          		GetScrollInfo (hwnd, SB_VERT, &si) ;

               				// If the position has changed, scroll the window and update it

          		if (si.nPos != iVertPos)
          		{                    
               			ScrollWindow (	hwnd, 0, cyChar * (iVertPos - si.nPos), 
                                   		NULL, NULL) ;
               			UpdateWindow (hwnd) ;
          		}
          		return 0 ;
          
     	case 	WM_HSCROLL:
               				// Get all the vertical scroll bar information

          		si.cbSize = sizeof (si) ;
          		si.fMask  = SIF_ALL ;

               				// Save the position for comparison later on

          		GetScrollInfo (hwnd, SB_HORZ, &si) ;
          		iHorzPos = si.nPos ;

          		switch (LOWORD (wParam))
          		{
          		case 	SB_LINELEFT:
               				si.nPos -= 1 ;
               				break ;
               
          		case 	SB_LINERIGHT:
               				si.nPos += 1 ;
               				break ;

          		case 	SB_PAGELEFT:
               				si.nPos -= si.nPage ;
               				break ;

          		case 	SB_PAGERIGHT:
               				si.nPos += si.nPage ;
               				break ;
               
          		case 	SB_THUMBPOSITION:
               				si.nPos = si.nTrackPos ;
               				break ;
               
         		default:
               			break ;
          		}
               			// Set the position and then retrieve it.  Due to adjustments
			//   by Windows it may not be the same as the value set.

		si.fMask = SIF_POS ;
          		SetScrollInfo (hwnd, SB_HORZ, &si, TRUE) ;
          		GetScrollInfo (hwnd, SB_HORZ, &si) ;
          
               			// If the position has changed, scroll the window 

          		if (si.nPos != iHorzPos)
          		{
               				ScrollWindow (	hwnd, cxChar * (iHorzPos - si.nPos), 0, 
                             				NULL, NULL) ;
          		}
          		return 0 ;

     	case 	WM_KEYDOWN :
          		switch (wParam)
          		{
          		case 	VK_HOME :
               				SendMessage (hwnd, WM_VSCROLL, SB_TOP, 0) ;
               				break ;
               
          		case 	VK_END :
               				SendMessage (hwnd, WM_VSCROLL, SB_BOTTOM, 0) ;
               				break ;
               
          		case 	VK_PRIOR :
               				SendMessage (hwnd, WM_VSCROLL, SB_PAGEUP, 0) ;
               				break ;
               
          		case 	VK_NEXT :
               				SendMessage (hwnd, WM_VSCROLL, SB_PAGEDOWN, 0) ;
               				break ;

          		case 	VK_UP :
               				SendMessage (hwnd, WM_VSCROLL, SB_LINEUP, 0) ;
               				break ;
               
          		case 	VK_DOWN :
               				SendMessage (hwnd, WM_VSCROLL, SB_LINEDOWN, 0) ;
               				break ;
               
          		case 	VK_LEFT :
               				SendMessage (hwnd, WM_HSCROLL, SB_PAGEUP, 0) ;
               				break ;
               
          		case 	VK_RIGHT :
               				SendMessage (hwnd, WM_HSCROLL, SB_PAGEDOWN, 0) ;
               				break ;
          		}
       		return 0 ;

     	case 	WM_MOUSEWHEEL:
          		if (iDeltaPerLine == 0)
               				break ;

          		iAccumDelta += (short) HIWORD (wParam) ;     // 120 or -120

          		while (iAccumDelta >= iDeltaPerLine)
          		{               
               				SendMessage (hwnd, WM_VSCROLL, SB_LINEUP, 0) ;
               				iAccumDelta -= iDeltaPerLine ;
          		}

          		while (iAccumDelta <= -iDeltaPerLine)
          		{
               				SendMessage (hwnd, WM_VSCROLL, SB_LINEDOWN, 0) ;
               				iAccumDelta += iDeltaPerLine ;
          		}

          		return 0 ;

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

               				// Get vertical scroll bar position

          			si.cbSize 		= sizeof (si) ;
          			si.fMask  			= SIF_POS ;
          			GetScrollInfo (hwnd, SB_VERT, &si) ;
          			iVertPos 			= si.nPos ;

               				// Get horizontal scroll bar position

          			GetScrollInfo (hwnd, SB_HORZ, &si) ;
          			iHorzPos = si.nPos ;

               				// Find painting limits

          			iPaintBeg = max (0, iVertPos + ps.rcPaint.top / cyChar) ;
          			iPaintEnd = min (NUMLINES - 1,
                     iVertPos + ps.rcPaint.bottom / cyChar) ;
          
          			for (i = iPaintBeg ; i <= iPaintEnd ; i++)
          			{
               				x = cxChar * (1 - iHorzPos) ;
               				y = cyChar * (i - iVertPos) ;
               
               				TextOut (	hdc, x, y,
                           sysmetrics[i].szLabel,
                            lstrlen (sysmetrics[i].szLabel)) ;
               
               				TextOut (	hdc, x + 22 * cxCaps, y,
                        	sysmetrics[i].szDesc,
                        	lstrlen (sysmetrics[i].szDesc)) ;
               
               				SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;
               
               	TextOut  (	hdc, x + 22 * cxCaps + 40 * cxChar, y, szBuffer,
                wsprintf (szBuffer, TEXT ("%5d"),
                GetSystemMetrics (sysmetrics[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) ;
}

转锟斤拷锟斤拷锟街会导锟斤拷Windows锟斤拷锟斤拷锟斤拷锟诫焦锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷腔锟斤拷锟斤拷伪锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷WM_MOUSEWHEEL讯息锟斤拷锟斤拷平锟斤拷一锟斤拷锟斤拷lParam锟斤拷锟斤拷没锟斤拷锟斤拷位锟矫ｏ拷锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟斤拷锟较角的ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷摹锟斤拷锟斤拷猓瑆Param锟侥碉拷锟斤拷锟斤拷锟斤拷锟揭幌碉拷械锟斤拷锟疥，锟斤拷於憋拷示锟斤拷锟襟按硷拷锟斤拷Shift锟斤拷Ctrl锟斤拷锟斤拷状态锟斤拷

锟铰碉拷锟斤拷讯锟斤拷锟斤拷锟斤拷wParam锟侥革拷锟斤拷锟介。锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷delta锟斤拷值锟斤拷锟斤拷值目前锟斤拷锟斤拷锟斤拷120锟斤拷-120锟斤拷锟斤拷取锟斤拷於伙拷锟街碉拷锟斤拷前转锟斤拷锟斤拷也锟斤拷锟斤拷说锟斤拷锟斤拷锟斤拷锟角帮拷妫拷锟斤拷锟斤拷邪锟脚ワ拷锟斤拷锟铰碉拷一锟剿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷转锟斤拷锟斤拷值120锟斤拷-120锟斤拷示锟侥硷拷锟斤拷锟街憋拷锟斤拷锟较伙拷锟斤拷锟铰撅拷锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷墓锟斤拷锟斤拷牵锟斤拷锟斤拷锟芥本锟侥伙拷锟斤拷锟斤拷锟斤拷锟叫憋拷锟斤拷锟节的伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺凤拷锟斤拷贫锟斤拷俣锟斤拷锟窖讹拷锟斤拷锟斤拷锟斤拷锟絛elta值锟斤拷锟斤拷锟斤拷40锟斤拷-40锟斤拷锟斤拷锟斤拷锟斤拷WM_MOUSEWHEEL讯息锟斤拷锟斤拷些值锟斤拷使锟侥硷拷只锟斤拷锟较伙拷锟斤拷锟铰撅拷锟斤拷一锟叫★拷

为使锟斤拷式锟斤拷锟斤拷一锟姐化锟斤拷锟斤拷执锟叫ｏ拷SYSMETS锟斤拷锟斤拷WM_CREATE锟斤拷WM_SETTINGCHANGE讯息锟斤拷锟斤拷时锟斤拷锟斤拷SPI_GETWHEELSCROLLLINES锟斤拷为锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷SystemParametersInfo锟斤拷锟斤拷值说锟斤拷WHEEL_DELTA锟斤拷delta值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷WHEEL_DELTA锟斤拷WINUSER.H锟叫讹拷锟藉。WHEEL_DELTA锟斤拷锟�120锟斤拷锟斤拷锟揭ｏ拷锟斤拷锟节讹拷锟斤拷锟斤拷锟絊ystemParametersInfo锟斤拷锟斤拷3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系锟斤拷delta值锟斤拷锟斤拷40锟斤拷SYSMETS锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷iDeltaPerLine锟斤拷

锟斤拷WM_MOUSEWHEEL讯息锟斤拷锟斤拷锟节间，SYSMETS锟斤拷delta值锟斤拷锟斤拷态锟斤拷锟斤拷iAccumDelta锟斤拷然锟结，锟斤拷锟絠AccumDelta锟斤拷於伙拷锟斤拷iDeltaPerLine锟斤拷锟斤拷锟斤拷锟斤拷小於伙拷锟斤拷-iDeltaPerLin锟斤拷锟斤拷SYSMETS锟斤拷SB_LINEUP锟斤拷SB_LINEDOWN值锟斤拷锟斤拷WM_VSCROLL讯息锟斤拷锟斤拷锟矫恳伙拷锟絎M_VSCROLL讯息锟斤拷iAccumDelta锟斤拷iDeltaPerLine锟斤拷锟接ｏ拷锟斤拷锟斤拷伲锟斤拷锟斤拷舜锟斤拷锟斤拷锟斤拷锟絛elta值锟斤拷於★拷小於伙拷锟届豆锟斤拷锟揭伙拷锟斤拷锟斤拷锟揭拷锟絛elta值锟斤拷

锟斤拷锟芥还锟斤拷
锟斤拷

锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷注目锟侥伙拷锟斤拷锟斤拷锟解：锟斤拷锟斤拷锟皆讹拷锟斤拷锟斤拷锟轿标。锟揭斤拷锟节碉拷十锟铰ｏ拷锟斤拷锟斤拷锟斤拷Windows锟斤拷源一锟斤拷锟斤拷锟桔达拷锟斤拷锟解。