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锟斤拷於筹拷式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为锟斤拷锟斤拷为锟斤拷只锟斤拷锟斤拷锟斤拷锟斤拷锟杰假讹拷锟接达拷锟斤拷小锟斤拷某一锟截讹拷锟竭寸，锟斤拷锟斤拷锟节筹拷式执锟斤拷时锟斤拷锟叫★拷岜ｏ拷植锟斤拷洹ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷悉图锟斤拷锟接达拷锟斤拷锟斤拷锟侥筹拷式锟斤拷疲锟斤拷锟叫╋拷锟斤拷瓶锟斤拷芑锟绞癸拷锟斤拷械锟斤拷锟斤拷龋锟斤拷锟斤拷锟斤拷偌锟斤拷锟接┠伙拷系锟揭伙拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟�80锟斤拷锟斤拷元锟剿★拷锟斤拷锟侥筹拷式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讯锟斤拷示锟斤拷锟斤拷Windows使锟斤拷锟竭匡拷锟狡筹拷式锟接达拷锟斤拷萤幕锟斤拷锟斤拷示锟侥凤拷式锟斤拷锟斤拷锟杰匡拷锟皆斤拷锟斤拷锟教讹拷锟斤拷小锟斤拷锟接达拷锟斤拷锟斤拷锟届都锟斤拷锟斤拷锟街拷锟斤拷应锟斤拷锟角猴拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟节达拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷使锟斤拷锟斤拷应锟斤拷锟杰癸拷锟侥憋拷应锟矫筹拷式锟接达拷锟侥达拷小锟斤拷锟斤拷锟侥筹拷式锟斤拷锟斤拷锟杰癸拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟侥达拷小锟斤拷锟斤拷锟揭猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟秸间。
锟斤拷锟斤拷锟斤拷锟街匡拷锟杰碉拷锟斤拷锟斤拷锟揭伙拷挚锟斤拷锟斤拷牵锟斤拷锟绞街伙拷薪锟斤拷锟斤拷锟绞撅拷锟絟ello锟斤拷锟斤拷锟斤拷示锟斤拷锟津；伙拷锟斤拷锟斤拷一锟街匡拷锟杰ｏ拷锟斤拷锟斤拷式锟斤拷一锟斤拷锟斤拷萤幕锟斤拷锟竭斤拷锟斤拷锟饺碉拷系统锟斤拷执锟叫ｏ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示锟斤拷锟斤拷页锟斤拷锟街★拷锟斤拷锟截达拷锟斤拷锟斤拷锟斤拷锟街硷拷锟斤拷锟斤拷Windows锟斤拷式锟斤拷频锟揭拷锟街伙拷锟�
锟斤拷一锟铰ｏ拷锟斤拷锟角斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷示锟斤拷讯锟侥凤拷式锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷说锟斤拷锟斤拷锟斤拷示锟斤拷式锟斤拷锟接革拷锟接★拷锟斤拷锟斤拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷示锟斤拷锟街伙拷图锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟狡★拷锟斤拷锟斤拷锟斤拷示锟斤拷锟津。憋拷锟斤拷锟斤拷锟截斤拷锟斤拷锟斤拷锟狡的凤拷锟斤拷锟斤拷
锟斤拷锟斤拷Windows为锟斤拷示图锟斤拷锟结供锟斤拷强锟斤拷锟酵硷拷锟阶帮拷媒锟斤拷妫℅DI锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟叫ｏ拷锟斤拷只锟斤拷锟杰硷拷锟斤拷锟斤拷锟叫碉拷锟斤拷示锟斤拷锟斤拷也锟斤拷锟斤拷锟斤拷Windows锟杰癸拷使锟矫的诧拷同锟斤拷锟斤拷锟斤拷锟轿硷拷锟斤拷锟斤拷锟叫★拷锟斤拷锟绞癸拷锟絎indows锟斤拷锟节讹拷系统锟斤拷锟藉。锟解看锟斤拷锟斤拷锟狡猴拷锟斤拷一锟斤拷锟斤拷锟狡ｏ拷锟斤拷实锟斤拷然锟斤拷锟斤拷锟斤拷锟芥及锟酵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Windows锟斤拷式锟斤拷啤锟斤拷诨锟斤拷锟斤拷示锟斤拷锟街猴拷图锟斤拷时锟斤拷Windows锟节讹拷锟斤拷锟斤拷锟斤拷锟皆拷锟叫⊥拷锟斤拷锟斤拷锟斤拷锟酵硷拷蔚某叽纭�
锟斤拷锟铰憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟桔伙拷图锟侥凤拷锟斤拷锟斤拷实锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷装锟斤拷锟睫关的筹拷式锟斤拷苹锟斤拷锟斤拷锟絎indows锟斤拷式只锟杰讹拷锟斤拷示锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟皆拷拇锟叫★拷锟斤拷锟斤拷俚募俣锟斤拷锟斤拷喾达拷兀锟斤拷锟斤拷锟绞癸拷锟絎indows锟结供锟侥癸拷锟斤拷锟斤拷取锟矫癸拷於筹拷式执锟叫伙拷锟斤拷锟斤拷锟斤拷讯锟斤拷
锟斤拷锟狡和革拷锟斤拷
锟斤拷
锟斤拷锟斤拷锟斤拷模式锟斤拷锟斤拷锟铰ｏ拷锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟解部锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷萤幕锟较碉拷锟斤拷锟捷伙拷停锟斤拷锟斤拷原锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟截碉拷锟斤拷失锟斤拷锟斤拷耍锟斤拷锟绞斤拷锟斤拷远锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟接┠伙拷锟绞臼憋拷锟斤拷锟斤拷锟斤拷讯锟斤拷
锟斤拷Windows锟叫ｏ拷只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斤拷锟斤拷趾锟酵硷拷危锟斤拷锟斤拷也锟斤拷锟饺凤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷莼锟揭恢憋拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟揭伙拷锟斤拷锟斤拷锟截革拷写锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤。锟斤拷锟界，使锟斤拷锟竭匡拷锟杰伙拷锟斤拷萤幕锟斤拷锟狡讹拷锟斤拷一锟斤拷锟斤拷式锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟酵匡拷锟杰革拷锟斤拷锟斤拷锟斤拷应锟矫筹拷式锟接达拷锟斤拷一锟斤拷锟街★拷Windows锟斤拷锟结保锟斤拷锟斤拷锟斤拷锟接达拷锟叫憋拷锟斤拷锟斤拷锟斤拷式锟斤拷锟角碉拷锟斤拷锟津，碉拷锟斤拷式锟狡匡拷锟结，Windows锟斤拷要锟斤拷锟斤拷锟侥筹拷式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街★拷
Windows锟斤拷一锟斤拷讯息锟斤拷锟斤拷系统锟斤拷锟斤拷通锟斤拷锟斤拷讯息投锟斤拷应锟矫筹拷式讯息锟斤拷锟斤拷锟叫伙拷锟竭帮拷讯息锟斤拷锟酵革拷锟斤拷锟绞碉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侥革拷锟斤拷锟铰硷拷通知锟斤拷应锟矫筹拷式锟斤拷Windows通锟斤拷锟斤拷锟斤拷WM_PAINT讯息通知锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟接达拷锟侥诧拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷要锟斤拷锟狡★拷
WM_PAINT讯息
锟斤拷
锟斤拷锟斤拷锟絎indows锟斤拷式锟斤拷WinMain锟叫斤拷锟斤拷讯息锟斤拷圈之前锟侥筹拷始锟斤拷锟节间都要锟斤拷锟叫猴拷式UpdateWindow锟斤拷Windows锟斤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酵碉拷一锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟窖断⑼ㄖ拷哟锟窖断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示锟斤拷锟津。达拷锟结，锟接达拷讯息锟斤拷锟斤拷锟斤拷式应锟斤拷锟轿猴拷时锟教讹拷准锟斤拷锟矫达拷锟斤拷锟斤拷锟斤拷WM_PAINT讯息锟斤拷锟斤拷要锟侥伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰伙拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟节凤拷锟斤拷锟斤拷锟芥几锟斤拷锟铰硷拷之一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揭伙拷锟絎M_PAINT讯息锟斤拷
- 锟斤拷使锟斤拷锟斤拷锟狡讹拷锟接达拷锟斤拷锟斤拷示锟接达拷时锟斤拷锟接达拷锟斤拷锟斤拷前锟斤拷锟斤拷锟截碉拷锟斤拷锟斤拷锟斤拷锟铰可硷拷锟斤拷
锟斤拷 - 使锟斤拷锟竭改憋拷锟接达拷锟侥达拷小锟斤拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷CS_HREDRAW锟斤拷CS_VREDRAW位元锟斤拷锟斤拷锟借定锟斤拷锟斤拷
锟斤拷 - 锟斤拷式使锟斤拷ScrollWindow锟斤拷ScrollDC锟斤拷式锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟揭伙拷锟斤拷帧锟�
锟斤拷 - 锟斤拷式使锟斤拷InvalidateRect锟斤拷InvalidateRgn锟斤拷式锟斤拷锟斤拷锟斤拷锟絎M_PAINT讯息锟斤拷
锟斤拷
锟斤拷某些锟斤拷锟斤拷拢锟斤拷锟绞撅拷锟斤拷锟斤拷一锟斤拷锟街憋拷锟斤拷时锟斤拷锟角ｏ拷Windows锟斤拷图锟斤拷锟斤拷一锟斤拷锟斤拷示锟斤拷锟津，诧拷锟斤拷锟斤拷锟斤拷指锟斤拷锟斤拷锟斤拷锟斤拷獠灰伙拷锟斤拷艹晒锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷Windows锟斤拷锟杰凤拷锟斤拷WM_PAINT讯息锟斤拷
- Windows锟斤拷锟斤拷锟斤拷锟斤拷锟剿诧拷锟斤拷锟接达拷锟侥对伙拷锟斤拷锟斤拷锟窖断拷锟斤拷椤�
锟斤拷 - 锟斤拷锟杰憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷然锟结被锟酵放★拷
锟斤拷 - 锟斤拷示锟斤拷锟斤拷锟斤拷示讯息锟斤拷
锟斤拷锟斤拷某些锟斤拷锟斤拷拢锟絎indows锟斤拷锟角憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟角碉拷锟斤拷示锟斤拷锟斤拷然锟斤拷指锟斤拷锟斤拷锟斤拷锟叫╋拷锟斤拷锟角ｏ拷
- 锟斤拷锟斤拷锟轿标穿越锟斤拷示锟斤拷锟斤拷
锟斤拷 - 图示锟较癸拷锟斤拷示锟斤拷锟斤拷
锟斤拷
锟斤拷锟斤拷WM_PAINT讯息要锟斤拷锟绞叫达拷锟斤拷吒谋锟斤拷约锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷思维锟斤拷式锟斤拷锟斤拷式应锟斤拷锟斤拷织锟缴匡拷锟皆憋拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷锟斤拷锟揭斤拷锟斤拷锟斤拷锟斤拷应要锟襟」ｏ拷锟斤拷Windows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_PAINT讯息时锟脚斤拷锟叫伙拷锟狡★拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟绞憋拷锟斤拷锟揭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角匡拷锟絎indows锟斤拷锟斤拷一锟斤拷WM_PAINT讯息锟斤拷锟解看锟斤拷锟狡猴拷锟斤拷锟斤拷萤幕锟斤拷锟斤拷示锟斤拷锟捷碉拷一锟斤拷锟斤拷锟斤拷锟皆讹拷姆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷峁癸拷锟斤拷源锟斤拷锟斤拷锟斤拷妗�
锟斤拷效锟斤拷锟轿猴拷锟斤拷效锟斤拷锟斤拷
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一锟斤拷锟斤拷锟秸碉拷WM_PAINT讯息之锟结，锟斤拷准锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟津，碉拷锟斤拷锟斤拷锟斤拷只锟斤拷要锟斤拷锟斤拷一锟斤拷锟斤拷小锟斤拷锟斤拷锟斤拷锟筋常锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫的撅拷锟斤拷锟斤拷锟津）★拷锟斤拷然锟斤拷锟斤拷锟皆伙拷锟斤拷锟介覆锟斤拷锟剿诧拷锟斤拷锟斤拷示锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟节诧拷锟斤拷锟皆伙拷锟斤拷锟斤拷之锟结，锟斤拷要锟截伙拷锟斤拷只锟斤拷锟斤拷前锟斤拷锟皆伙拷锟斤拷锟斤拷锟斤拷住锟侥撅拷锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷效锟斤拷锟津」或「革拷锟斤拷锟斤拷锟津」★拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷拇锟斤拷冢锟斤拷呕锟斤拷锟絎indows锟斤拷一锟斤拷WM_PAINT讯息锟斤拷锟斤拷应锟矫筹拷式锟斤拷讯息锟斤拷锟斤拷锟叫★拷只锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟侥骋伙拷锟斤拷锟绞憋拷锟斤拷哟锟斤拷呕锟斤拷锟斤拷WM_PAINT讯息锟斤拷
Windows锟节诧拷为每锟斤拷锟接达拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷图锟斤拷讯锟结构锟斤拷锟斤拷锟斤拷锟斤拷峁癸拷锟斤拷锟斤拷税锟轿э拷锟叫э拷锟斤拷锟斤拷锟斤拷小锟斤拷锟轿碉拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷锟斤拷尉徒锟斤拷锟斤拷锟斤拷锟叫э拷锟斤拷巍锟斤拷锟斤拷锟绞币诧拷锟轿拷锟斤拷锟叫э拷锟斤拷颉埂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WM_PAINT讯息之前锟斤拷示锟斤拷锟斤拷锟叫碉拷锟斤拷一锟斤拷锟斤拷锟斤拷锟轿拷锟叫э拷锟斤拷锟絎indows锟斤拷锟斤拷锟揭伙拷锟斤拷锟轿э拷锟斤拷锟斤拷锟斤拷锟斤拷锟铰碉拷锟斤拷效锟斤拷锟斤拷锟皆硷拷一锟斤拷锟铰碉拷锟斤拷效锟斤拷锟轿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟街变化锟斤拷锟斤拷锟窖讹拷锟斤拷诨锟斤拷锟斤拷锟窖讹拷峁癸拷小锟絎indows锟斤拷锟结将锟斤拷锟絎M_PAINT讯息锟斤拷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锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷InvalidateRect使锟斤拷示锟斤拷锟斤拷锟节的撅拷锟斤拷锟斤拷效锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷锟斤拷丫锟斤拷锟斤拷锟揭伙拷锟絎M_PAINT讯息锟斤拷Windows锟斤拷锟斤拷锟斤拷锟斤拷碌锟斤拷锟叫э拷锟斤拷巍锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷碌锟絎M_PAINT讯息锟斤拷锟斤拷讯息锟斤拷锟斤拷锟叫★拷锟节斤拷锟秸碉拷WM_PAINT讯息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取锟斤拷锟斤拷效锟斤拷锟轿碉拷锟斤拷锟疥（锟斤拷锟斤拷锟斤拷锟较就会看锟斤拷锟斤拷一锟姐）锟斤拷通锟斤拷锟斤拷锟斤拷GetUpdateRect锟斤拷锟斤拷锟斤拷锟斤拷锟轿猴拷时锟斤拷取锟斤拷锟斤拷些锟斤拷锟疥。
锟节达拷锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟节间，锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟节猴拷锟斤拷锟斤拷BeginPaint之锟结，锟斤拷锟斤拷锟斤拷示锟斤拷锟津即憋拷为锟斤拷效锟斤拷锟斤拷式也锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷ValidateRect锟斤拷式使锟斤拷示锟斤拷锟斤拷锟节碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷效锟斤拷锟斤拷锟斤拷锟斤拷锟叫撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷锟轿拷锟叫э拷锟叫э拷锟斤拷锟斤拷锟侥壳帮拷锟斤拷锟斤拷械锟斤拷魏锟絎M_PAINT讯息锟斤拷锟斤拷锟斤拷删锟斤拷锟斤拷
GDI锟斤拷锟�
锟斤拷
要锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟酵硷拷锟斤拷锟斤拷锟绞癸拷锟絎indows锟斤拷图锟斤拷装锟矫斤拷锟芥（GDI锟斤拷锟斤拷式锟斤拷Windows锟结供锟剿硷拷锟斤拷GDI锟斤拷式锟斤拷锟斤拷於斤拷锟街达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斤拷凇锟斤拷锟斤拷锟斤拷丫锟斤拷锟斤拷锟揭伙拷驴锟斤拷锟紻rawText锟斤拷式锟斤拷锟斤拷锟斤拷目前使锟斤拷锟斤拷为锟秸憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷TextOut锟斤拷锟矫猴拷式锟侥革拷式锟斤拷锟铰ｏ拷
TextOut (hdc, x, y, psText, iLength) ;
TextOut锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷写锟斤拷锟街达拷锟斤拷psText锟斤拷锟斤拷锟斤拷指锟斤拷锟街达拷锟斤拷指锟疥，iLength锟斤拷锟街达拷锟侥筹拷锟饺★拷x锟斤拷y锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街达拷锟斤拷锟斤拷示锟斤拷锟斤拷目锟绞嘉伙拷茫锟斤拷锟斤拷没峤诧拷锟斤拷锟斤拷锟斤拷锟角碉拷锟斤拷细锟斤拷锟斤拷锟斤拷锟絟dc锟斤拷锟斤拷锟角★拷装锟斤拷锟斤拷锟捷达拷锟脚★拷锟斤拷锟斤拷锟斤拷GDI锟斤拷锟斤拷要锟斤拷锟街★拷实锟斤拷锟较ｏ拷每锟斤拷GDI锟斤拷式锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟绞斤拷牡锟揭伙拷锟斤拷锟斤拷锟斤拷锟�
装锟斤拷锟斤拷锟斤拷
锟斤拷
锟斤拷锟竭匡拷锟杰伙拷锟角得ｏ拷锟斤拷锟斤拷只锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷值锟斤拷Windows锟斤拷锟斤拷锟斤拷锟节诧拷使锟斤拷锟斤拷锟斤拷锟斤拷锟绞叫达拷锟斤拷叽锟絎indows取锟矫达拷锟脚ｏ拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷使锟矫该达拷锟脚★拷装锟斤拷锟斤拷锟捷达拷锟斤拷锟斤拷GDI锟斤拷式锟斤拷锟接达拷锟斤拷通锟斤拷证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ｏ拷锟斤拷式写锟斤拷锟竭撅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匣锟酵硷拷锟绞雇硷拷锟斤拷锟斤拷约锟斤拷锟皆革拷乇锟矫好匡拷锟斤拷锟斤拷锟窖匡拷锟斤拷
装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟轿拷锟紻C锟斤拷锟斤拷实锟斤拷锟斤拷锟斤拷GDI锟节诧拷锟斤拷锟斤拷锟斤拷锟斤拷辖峁癸拷锟阶帮拷锟斤拷锟斤拷锟斤拷锟斤拷囟锟斤拷锟斤拷锟绞撅拷璞革拷锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷锟接★拷锟斤拷锟斤拷锟斤拷锟截★拷锟斤拷锟斤拷锟窖讹拷锟绞撅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绞撅拷锟斤拷系锟斤拷囟锟斤拷哟锟斤拷锟截★拷
装锟斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷些值锟斤拷图锟轿★拷锟斤拷锟皆★拷锟斤拷锟斤拷些锟斤拷锟皆讹拷锟斤拷锟斤拷GDI锟斤拷图锟斤拷式锟斤拷锟斤拷锟斤拷细锟节★拷锟斤拷锟界，锟斤拷锟絋extOut锟斤拷装锟斤拷锟斤拷锟捷碉拷锟斤拷锟斤拷确锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷色锟斤拷锟斤拷锟街的憋拷锟斤拷色锟斤拷x锟斤拷锟斤拷锟統锟斤拷锟斤拷映锟戒到锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷姆锟绞斤拷锟斤拷约锟斤拷锟绞撅拷锟斤拷锟绞盬indows使锟矫碉拷锟斤拷锟藉。
锟斤拷锟斤拷式锟斤拷要锟斤拷图时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷锟斤拷取锟斤拷锟剿该达拷锟斤拷锟结，Windows锟斤拷锟节讹拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟节诧拷装锟斤拷锟斤拷锟捷结构锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷陆锟斤拷锟斤拷锟斤拷峥达拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷胁锟酵拷锟紾DI锟斤拷式锟侥憋拷锟斤拷些预锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GDI锟斤拷式锟斤拷锟斤拷取锟斤拷锟斤拷些锟斤拷锟皆碉拷目前值锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GDI锟斤拷式锟杰癸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斤拷锟截伙拷图锟斤拷
锟斤拷锟斤拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟酵硷拷锟斤拷锟结，锟斤拷锟斤拷锟斤拷锟酵凤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷锟斤拷锟脚憋拷锟斤拷式锟酵凤拷锟斤拷筒锟斤拷锟斤拷锟叫э拷锟斤拷也锟斤拷锟斤拷俦锟绞癸拷谩锟斤拷锟绞斤拷锟斤拷锟斤拷诖锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷诩锟饺★拷煤锟斤拷头糯锟斤拷拧锟斤拷锟斤拷撕锟斤拷锟紺reateDC锟斤拷锟斤拷式锟斤拷锟节憋拷锟斤拷锟捷诧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之锟解，锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷讯息之锟戒保锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷
Windows应锟矫筹拷式一锟斤拷使锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟皆憋拷锟斤拷萤幕锟较伙拷图锟斤拷
取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷锟斤拷一
锟斤拷
锟节达拷锟斤拷WM_PAINT讯息时锟斤拷使锟斤拷锟斤拷锟街凤拷锟斤拷锟斤拷锟斤拷锟芥及BeginPaint锟斤拷EndPaint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式锟斤拷要锟接达拷锟斤拷锟脚ｏ拷锟斤拷为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PAINTSTRUCT锟结构锟侥憋拷锟斤拷锟斤拷锟斤拷WINUSER.H锟斤拷头锟斤拷锟斤拷锟叫讹拷锟藉）锟侥碉拷址为锟斤拷锟斤拷锟斤拷Windows锟斤拷式写锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷一锟结构锟斤拷锟斤拷锟斤拷锟斤拷为ps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叫讹拷锟斤拷锟斤拷锟斤拷
PAINTSTRUCT ps ;
锟节达拷锟斤拷WM_PAINT讯息时锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟饺猴拷锟斤拷BeginPaint锟斤拷BeginPaint锟斤拷式一锟斤拷锟斤拷准锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷谋锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷煤锟绞揭诧拷锟斤拷锟絧s锟结构锟斤拷锟斤拷位锟斤拷BeginPaint锟斤拷锟截碉拷值锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷一锟斤拷锟斤拷值通锟斤拷锟斤拷锟斤拷锟斤拷锟节斤拷锟斤拷hdc锟侥憋拷锟斤拷锟叫★拷锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟叫的讹拷锟斤拷锟斤拷锟铰ｏ拷
HDC hdc ;
HDC锟斤拷锟斤拷锟斤拷态锟斤拷锟斤拷为32位元锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷然锟结，锟斤拷式锟酵匡拷锟斤拷使锟斤拷锟斤拷要装锟斤拷锟斤拷锟捷达拷锟脚碉拷TextOut锟斤拷GDI锟斤拷式锟斤拷锟斤拷锟斤拷EndPaint锟斤拷锟斤拷锟酵凤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷
一锟斤拷兀锟斤拷锟斤拷锟絎M_PAINT讯息锟斤拷锟斤拷式锟斤拷锟铰ｏ拷
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
使锟斤拷GDI锟斤拷式
EndPaint (hwnd, &ps) ;
return 0 ;
锟节达拷锟斤拷WM_PAINT讯息时锟斤拷锟斤拷锟斤拷啥缘睾锟斤拷锟紹eginPaint锟斤拷EndPaint锟斤拷锟斤拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟絎M_PAINT讯息锟斤拷锟斤拷锟斤拷锟斤拷锟诫将WM_PAINT讯息锟斤拷锟捷革拷Windows锟斤拷DefWindowProc锟斤拷锟节讹拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷DefWindowProc锟斤拷锟斤拷锟叫达拷锟诫处锟斤拷WM_PAINT讯息锟斤拷
case WM_PAINT: BeginPaint (hwnd, &ps) ; EndPaint (hwnd, &ps) ; return 0 ;
锟斤拷锟斤拷锟斤拷BeginPaint锟斤拷EndPaint锟斤拷锟斤拷之锟斤拷锟斤拷没锟斤拷锟轿猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷前锟斤拷效锟斤拷锟斤拷锟轿拷锟叫э拷锟斤拷锟斤拷锟斤拷路锟斤拷锟斤拷谴锟斤拷锟侥ｏ拷
case WM_PAINT: return 0 ; // WRONG !!!
Windows锟斤拷一锟斤拷WM_PAINT讯息锟脚碉拷讯息锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷为锟斤拷示锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷BeginPaint锟斤拷EndPaint锟斤拷锟斤拷锟斤拷ValidateRect锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟轿拷锟叫э拷锟斤拷喾达拷锟絎indows锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷WM_PAINT讯息锟斤拷锟斤拷一直锟斤拷锟斤拷锟斤拷去锟斤拷
锟斤拷图锟斤拷讯锟结构
锟斤拷
前锟斤拷锟结到锟斤拷锟斤拷Windows为每锟斤拷锟接达拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷图锟斤拷讯锟结构锟斤拷锟斤拷锟斤拷锟斤拷锟絇AINTSTRUCT锟斤拷锟斤拷锟斤拷锟斤拷锟铰ｏ拷
typedef struct tagPAINTSTRUCT
{
HDC hdc ;
BOOL fErase ;
RECT rcPaint ;
BOOL fRestore ;
BOOL fIncUpdate ;
BYTE rgbReserved[32] ;
} PAINTSTRUCT ;
锟节筹拷式锟斤拷锟斤拷BeginPaint时锟斤拷Windows锟斤拷锟绞碉拷锟斤拷锟斤拷媒峁癸拷母锟斤拷锟斤拷锟轿恢碉拷锟绞癸拷锟斤拷叱锟绞街皇癸拷锟角帮拷锟斤拷锟斤拷锟轿伙拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟絎indows锟节诧拷使锟矫★拷hdc锟斤拷位锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷锟节旧版本锟斤拷Windows锟叫ｏ拷BeginPaint锟侥达拷锟斤拷值也锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷荽锟斤拷拧锟斤拷诖锟斤拷锟斤拷锟斤拷锟斤拷拢锟� fErase锟斤拷锟斤拷志为FALSE(0)锟斤拷锟斤拷锟斤拷味锟斤拷Windows锟窖撅拷锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷锟轿的憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷BeginPaint锟斤拷式锟叫凤拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷锟斤拷约锟斤拷锟斤拷锟揭恍╋拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟斤拷写锟斤拷锟絎M_ERASEBKGND讯息锟斤拷锟斤拷Windows使锟斤拷WNDCLASS锟结构锟斤拷hbrBackground锟斤拷位指锟斤拷锟侥伙拷刷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絎NDCLASS锟结构锟角筹拷式锟斤拷WinMain锟斤拷始锟斤拷锟节硷拷锟铰硷拷哟锟斤拷锟斤拷时使锟矫的★拷锟斤拷锟斤拷Windows锟斤拷式使锟矫帮拷色锟斤拷刷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟借定锟接达拷锟斤拷锟结构锟斤拷位值锟斤拷
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞酵拷锟斤拷锟斤拷锟絎indows锟斤拷式InvalidateRect使锟斤拷示锟斤拷锟斤拷锟叫的撅拷锟斤拷失效锟斤拷锟斤拷煤锟绞斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷欠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为FALSE锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷Windows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诤锟斤拷锟斤拷锟紹eginPaint锟斤拷PAINTSTRUCT锟结构锟斤拷fErase锟斤拷位锟斤拷为TRUE锟斤拷锟斤拷锟姐）锟斤拷
PAINTSTRUCT锟结构锟斤拷rcPaint锟斤拷位锟斤拷RECT锟斤拷态锟侥结构锟斤拷锟斤拷锟窖撅拷锟节碉拷锟斤拷锟斤拷锟叫匡拷锟斤拷锟斤拷RECT锟结构锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟轿ｏ拷锟斤拷锟侥革拷锟斤拷位为left锟斤拷top锟斤拷right锟斤拷bottom锟斤拷PAINTSTRUCT锟结构锟斤拷rcPaint锟斤拷位锟斤拷锟斤拷锟斤拷锟斤拷效锟斤拷锟轿的边界，锟斤拷图4-1锟斤拷示锟斤拷锟斤拷些值锟斤拷锟斤拷图锟斤拷为锟斤拷位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恰锟斤拷锟叫э拷锟斤拷锟斤拷锟接︼拷锟斤拷鼗锟斤拷锟斤拷锟斤拷锟�
锟斤拷
| 图4-1 锟斤拷效锟斤拷锟轿的边斤拷 |
PAINTSTRUCT锟叫碉拷rcPaint锟斤拷锟轿诧拷锟斤拷锟斤拷锟斤拷效锟斤拷锟轿ｏ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轿★拷锟斤拷锟斤拷味锟斤拷Windows锟斤拷锟斤拷图锟斤拷锟斤拷锟斤拷锟斤拷锟节硷拷取锟斤拷锟斤拷锟节ｏ拷锟斤拷确锟叫碉拷说锟斤拷锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷危锟斤拷锟絎indows锟斤拷锟斤拷图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冢锟斤拷锟�
锟节达拷锟斤拷WM_PAINT讯息时锟斤拷为锟斤拷锟节革拷锟铰的撅拷锟斤拷锟斤拷锟酵硷拷锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷潞锟斤拷校锟�
InvalidateRect (hwnd, NULL, TRUE) ;
锟矫猴拷锟斤拷锟斤拷BeginPaint锟斤拷锟斤拷之前锟斤拷锟叫ｏ拷锟斤拷使锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟轿拷锟叫э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牵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紽ALSE锟斤拷锟津不诧拷锟斤拷锟斤拷锟斤拷锟斤拷原锟叫的讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷原锟斤拷锟斤拷
通锟斤拷锟斤拷锟斤拷Windows锟斤拷式锟斤拷锟斤拷锟桔猴拷时锟秸碉拷WM_PAINT讯息锟斤拷锟斤拷锟斤拷锟斤拷rcPaint锟结构锟斤拷锟斤拷锟斤拷录虻サ锟斤拷鼗锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷罘斤拷锟侥凤拷锟斤拷锟斤拷锟斤拷锟界，锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷邪锟斤拷锟斤拷锟揭伙拷锟皆诧拷锟斤拷锟斤拷锟街伙拷锟皆诧拷锟揭伙拷锟斤拷锟斤拷涞斤拷锟斤拷锟叫э拷锟斤拷锟斤拷校锟斤拷锟斤拷锟绞癸拷锟斤拷锟斤拷锟皆诧拷锟斤拷锟叫э拷锟斤拷直锟斤拷没锟斤拷锟斤拷锟藉。锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷圆锟斤拷锟斤拷锟斤拷使锟矫达拷BeginPaint锟斤拷锟截碉拷装锟斤拷锟斤拷锟捷达拷锟斤拷时锟斤拷Windows锟斤拷锟斤拷锟斤拷锟絩cPaint锟斤拷锟斤拷锟斤拷锟斤拷魏尾锟斤拷帧锟�
锟节碉拷锟斤拷锟铰碉拷HELLOWIN锟斤拷式锟叫ｏ拷锟斤拷锟角诧拷锟斤拷锟斤拷锟侥达拷锟斤拷WM_PAINT讯息时锟斤拷锟斤拷效锟斤拷锟轿★拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟角★拷锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷冢锟斤拷锟斤拷锟紻rawText锟街革拷之锟斤拷锟斤拷锟斤拷锟节达拷锟斤拷DrawText锟斤拷锟叫碉拷某锟斤拷时锟教ｏ拷Windows锟斤拷确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锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟斤拷锟揭憋拷洹ｏ拷锟斤拷某锟绞斤拷锟斤拷芎锟斤拷俣鹊某锟绞叫达拷锟斤拷锟较ｏ拷锟斤拷诖锟斤拷锟絎M_PAINT锟节硷拷使锟斤拷锟斤拷效锟斤拷锟轿凤拷围锟斤拷锟皆憋拷锟解不锟斤拷要锟斤拷GDI锟斤拷锟叫★拷锟斤拷锟斤拷锟斤拷锟绞憋拷锟揭拷锟饺★拷锟斤拷锟斤拷锟斤拷图锟斤拷锟斤拷锟侥达拷片锟斤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锟揭拷锟�
取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
锟斤拷然锟斤拷锟斤拷锟斤拷诖锟斤拷锟絎M_PAINT讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷颍锟斤拷锟斤拷锟揭诧拷岱拷锟斤拷诖锟斤拷锟斤拷锟絎M_PAINT讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷某锟斤拷锟斤拷锟斤拷也锟角非筹拷锟斤拷锟矫的★拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷装锟斤拷锟斤拷锟捷达拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥匡拷模锟斤拷锟饺★拷锟阶帮拷锟斤拷锟斤拷莸锟斤拷锟窖讹拷锟�
要锟矫碉拷锟接达拷锟斤拷示锟斤拷锟斤拷锟阶帮拷锟斤拷锟斤拷荽锟斤拷牛锟斤拷锟斤拷院锟斤拷锟紾etDC锟斤拷取锟矫达拷锟脚ｏ拷锟斤拷使锟斤拷锟斤拷锟斤拷锟斤拷锟絉eleaseDC锟斤拷
hdc = GetDC (hwnd) ; 使锟斤拷GDI锟斤拷式 ReleaseDC (hwnd, hdc) ;
锟斤拷BeginPaint锟斤拷EndPaint一锟斤拷锟斤拷GetDC锟斤拷ReleaseDC锟斤拷式锟斤拷锟斤拷啥缘锟绞癸拷谩锟斤拷锟斤拷锟节达拷锟斤拷某讯息时锟斤拷锟斤拷GetDC锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷顺锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞街帮拷锟斤拷锟絉eleaseDC锟斤拷锟斤拷要锟斤拷一锟斤拷讯息锟叫猴拷锟斤拷GetDC却锟斤拷锟斤拷一锟斤拷讯息锟斤拷锟斤拷ReleaseDC锟斤拷
锟斤拷锟紹eginPaint锟斤拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚诧拷同锟斤拷GetDC锟斤拷锟截碉拷装锟斤拷锟斤拷锟捷达拷锟脚撅拷锟斤拷一锟斤拷锟斤拷取锟斤拷锟轿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷颉？锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷某一锟斤拷锟街伙拷图锟斤拷锟斤拷锟斤拷只锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷锟较伙拷图锟斤拷锟斤拷锟饺肥碉拷锟斤拷锟斤拷锟叫э拷锟斤拷危锟斤拷锟斤拷锟紹eginPaint锟斤拷同锟斤拷GetDC锟斤拷锟斤拷使锟轿猴拷锟斤拷效锟斤拷锟斤拷锟轿拷锟叫э拷锟斤拷锟斤拷锟斤拷要使锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷效锟斤拷锟斤拷锟皆猴拷锟斤拷
ValidateRect (hwnd, NULL) ;
一锟斤拷锟斤拷院锟斤拷锟紾etDC锟斤拷ReleaseDC锟斤拷锟皆硷拷锟斤拷讯息锟斤拷锟斤拷锟斤拷锟街达拷锟斤拷锟斤拷式锟叫ｏ拷锟酵伙拷锟斤拷讯息锟斤拷锟斤拷锟节伙拷图锟斤拷式锟叫ｏ拷锟斤拷锟斤拷锟斤拷应锟斤拷锟斤拷时锟斤拷锟斤拷式锟斤拷锟斤拷锟斤拷锟教革拷锟斤拷使锟斤拷锟竭的硷拷锟教伙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津，讹拷锟斤拷锟斤拷要锟斤拷锟斤拷为锟斤拷锟接达拷锟斤拷锟斤拷效锟斤拷锟斤拷锟绞癸拷锟絎M_PAINT讯息锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷确实锟秸碉拷锟斤拷WM_PAINT讯息锟斤拷锟斤拷式锟酵憋拷锟斤拷要锟秸硷拷锟姐够锟斤拷锟斤拷讯锟斤拷锟斤拷芨锟斤拷锟斤拷锟绞撅拷锟�
锟斤拷GetDC锟斤拷锟狡的猴拷式锟斤拷GetWindowDC锟斤拷GetDC锟斤拷锟斤拷锟斤拷锟叫达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达拷锟脚ｏ拷锟斤拷GetWindowDC锟斤拷锟斤拷写锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷锟斤拷锟界，锟斤拷锟侥筹拷式锟斤拷锟斤拷使锟矫达拷GetWindowDC锟斤拷锟截碉拷装锟斤拷锟斤拷锟捷达拷锟斤拷锟斤拷锟接达拷锟侥憋拷锟斤拷锟斤拷锟斤拷写锟斤拷锟斤拷锟街★拷然锟斤拷锟斤拷锟斤拷式同锟斤拷也应锟矫达拷锟斤拷WM_NCPAINT 锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷啤锟斤拷锟窖断拷锟�
TextOut锟斤拷细锟斤拷
锟斤拷
TextOut锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷值锟斤拷畛ｏ拷玫锟紾DI锟斤拷式锟斤拷锟斤法锟角ｏ拷
TextOut (hdc, x, y, psText, iLength) ;
锟斤拷锟铰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�
锟斤拷一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ｏ拷锟斤拷锟饺匡拷锟斤拷锟斤拷GetDC锟侥达拷锟斤拷值锟斤拷也锟斤拷锟斤拷锟斤拷锟节达拷锟斤拷WM_PAINT讯息时BeginPaint锟侥达拷锟斤拷值锟斤拷
装锟斤拷锟斤拷锟捷碉拷锟斤拷锟皆匡拷锟斤拷锟剿憋拷锟斤拷示锟斤拷锟街达拷锟斤拷锟斤拷锟界。锟斤拷锟界，装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指锟斤拷锟斤拷锟斤拷锟斤拷色锟斤拷锟节讹拷锟斤拷色为锟斤拷色锟斤拷锟节讹拷装锟斤拷锟斤拷锟捷伙拷锟斤拷锟斤拷锟剿帮拷色锟侥憋拷锟斤拷锟斤拷锟节筹拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟绞憋拷锟絎indows使锟斤拷锟斤拷锟斤拷锟斤拷锟缴拷锟斤拷锟斤拷锟斤拷锟皆拷锟轿э拷木锟斤拷慰占洌拷锟轿拷锟斤拷锟皆拷颉梗锟斤拷锟�
锟斤拷锟斤拷锟街憋拷锟斤拷色锟诫定锟斤拷锟接达拷锟斤拷锟绞憋拷锟斤拷玫谋锟斤拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷哟锟斤拷锟斤拷锟叫的憋拷锟斤拷锟斤拷一锟斤拷锟斤拷刷锟斤拷锟斤拷锟斤拷一锟街达拷色锟斤拷锟竭非达拷色锟斤拷傻幕锟剿拷锟絎indows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锟斤拷装锟斤拷锟斤拷锟捷结构锟斤拷一锟斤拷锟街★拷锟节讹拷锟斤拷锟接达拷锟斤拷锟结构时锟斤拷锟斤拷锟斤拷锟絎indows应锟矫筹拷式使锟斤拷WHITE_BRUSH锟斤拷锟皆憋拷锟节讹拷装锟斤拷锟斤拷锟斤拷锟叫碉拷锟节讹拷锟斤拷锟街憋拷锟斤拷锟斤拷色锟斤拷Windows锟斤拷锟皆诧拷锟斤拷锟斤拷示锟斤拷锟津背撅拷锟侥伙拷刷锟斤拷色锟斤拷同锟斤拷
psText锟斤拷锟斤拷锟斤拷指锟斤拷锟街达拷锟斤拷指锟疥，iLength锟斤拷锟街达拷锟斤拷锟斤拷元锟侥革拷锟斤拷锟斤拷锟斤拷锟絧sText指锟斤拷Unicode锟街达拷锟斤拷锟斤拷锟街达拷锟叫碉拷位元锟斤拷锟斤拷锟斤拷锟斤拷iLength值锟斤拷锟斤拷锟斤拷锟斤拷锟街达拷锟叫诧拷锟杰帮拷锟斤拷锟轿猴拷ASCII锟斤拷锟斤拷锟斤拷元锟斤拷锟斤拷爻锟斤拷锟斤拷锟斤拷小锟斤拷票锟斤拷锟斤拷烁瘢锟絎indows锟结将锟斤拷些锟斤拷锟斤拷锟斤拷元锟斤拷示为实锟侥块。Text0ut锟斤拷识锟斤拷锟斤拷为锟街达拷锟斤拷锟斤拷锟斤拷志锟斤拷锟斤拷锟斤拷为锟斤拷锟轿辉拷椋拷锟斤拷Unicode锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷态锟斤拷0锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷nLength锟斤拷锟斤拷指锟斤拷锟斤拷锟饺★拷
TextOut锟叫碉拷x锟斤拷y锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟街达拷锟侥匡拷始位锟矫ｏ拷x锟斤拷水平位锟矫ｏ拷y锟角达拷直位锟矫★拷锟街达拷锟叫碉拷一锟斤拷锟斤拷元锟斤拷锟斤拷锟较斤拷位锟斤拷锟斤拷锟斤拷(x,y)锟斤拷锟斤拷锟节讹拷锟斤拷装锟斤拷锟斤拷锟斤拷锟叫ｏ拷原锟姐（x锟斤拷y锟斤拷为0锟侥点）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斤拷锟斤拷TextOut锟叫斤拷x锟斤拷y锟斤拷为0锟斤拷锟津将达拷锟斤拷示锟斤拷锟斤拷锟斤拷锟较角匡拷始锟斤拷锟斤拷执锟斤拷锟�
锟斤拷锟斤拷锟侥讹拷GDI锟斤拷图锟斤拷式锟斤拷锟斤拷锟斤拷TextOut锟斤拷锟斤拷锟侥硷拷时锟斤拷锟酵会发锟街达拷锟捷革拷锟斤拷式锟斤拷锟斤拷锟疥常锟斤拷锟斤拷锟斤拷为锟斤拷锟竭硷拷锟斤拷锟疥」锟斤拷锟节碉拷锟斤拷锟铰伙拷锟斤拷细锟截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阶拷猓琖indows锟斤拷锟斤拷锟洁「锟斤拷锟斤拷映锟戒方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GDI锟斤拷式指锟斤拷锟斤拷锟竭硷拷锟斤拷锟斤拷转锟斤拷为锟斤拷示锟斤拷锟斤拷实锟斤拷图锟斤拷锟斤拷锟斤拷姆锟绞斤拷锟接筹拷浞绞斤拷锟阶帮拷锟斤拷锟斤拷锟斤拷卸锟斤拷澹拷诙锟接筹拷浞绞斤拷锟組M_TEXT锟斤拷使锟斤拷WINGDI.H锟叫讹拷锟斤拷锟绞讹拷锟斤拷郑锟斤拷锟斤拷锟組M_TEXT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图锟截ｏ拷x锟斤拷值锟斤拷锟斤拷锟斤拷锟揭碉拷锟斤拷锟斤拷y锟斤拷值锟斤拷锟斤拷锟斤拷锟铰碉拷锟斤拷锟斤拷锟轿匡拷图4-2锟斤拷锟斤拷MM_TEXT锟斤拷锟斤拷系锟斤拷Windows锟斤拷PAINTSTRUCT锟结构锟叫讹拷锟斤拷锟斤拷效锟斤拷锟斤拷时使锟矫碉拷锟斤拷锟斤拷系锟斤拷同锟斤拷锟斤拷为锟斤拷锟角达拷锟斤拷锟剿很多方锟姐（锟斤拷锟角ｏ拷锟斤拷锟斤拷映锟戒方式锟斤拷锟斤拷锟斤拷耍锟斤拷锟�
锟斤拷
| 图4-2 MM_TEXT映锟戒方式锟铰碉拷x锟斤拷锟斤拷锟統锟斤拷锟斤拷 |
装锟斤拷锟斤拷锟斤拷也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窖撅拷锟斤拷锟斤拷锟斤拷锟斤拷於达拷GetDC取锟矫碉拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟节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示锟斤拷锟津；讹拷锟斤拷於达拷BeginPaint取锟矫碉拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷为锟斤拷效锟斤拷锟斤拷Windows锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟斤拷之锟斤拷锟斤拷魏锟轿伙拷锟斤拷锟绞撅拷执锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷元锟斤拷一锟斤拷锟斤拷锟节硷拷锟斤拷锟斤拷锟斤拷锟解，锟斤拷Windows锟斤拷只锟斤拷示锟斤拷锟斤拷锟斤拷锟节碉拷锟角诧拷锟街★拷要锟诫将锟斤拷锟叫达拷锟斤拷哟锟斤拷锟斤拷锟绞撅拷锟斤拷锟街拷獠伙拷锟斤拷锟矫达拷锟斤拷椎模锟斤拷锟斤拷圆锟斤拷玫锟斤拷幕锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椤�
系统锟斤拷锟斤拷
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装锟斤拷锟斤拷锟捷伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷TextOut锟斤拷示锟斤拷锟斤拷时Windows使锟矫碉拷锟斤拷锟藉。锟节讹拷锟斤拷锟斤拷为锟斤拷系统锟斤拷锟藉」锟斤拷锟斤拷锟斤拷Windows锟斤拷头锟斤拷锟斤拷锟叫碉拷识锟斤拷锟街ｏ拷锟斤拷SYSTEM_FONT锟斤拷系统锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷锟节憋拷锟斤拷锟叫★拷锟斤拷锟杰憋拷锟酵对伙拷锟斤拷锟斤拷锟斤拷锟斤拷示锟街达拷锟斤拷锟节讹拷锟斤拷锟藉。
锟斤拷Windows锟斤拷锟斤拷锟节版本锟叫ｏ拷系统锟斤拷锟斤拷锟角等匡拷(fixed-pitch)锟斤拷锟藉，锟斤拷锟斤拷味锟斤拷锟斤拷锟斤拷锟斤拷元锟斤拷锟斤拷锟斤拷同锟斤拷锟侥匡拷锟饺ｏ拷锟角筹拷锟斤拷锟斤拷於达拷锟街伙拷锟斤拷然锟斤拷锟斤拷锟斤拷Windows 3.0锟斤拷始锟斤拷系统锟斤拷锟斤拷锟轿伙拷直锟斤拷(variable-pitch)锟斤拷锟藉，锟斤拷锟斤拷味锟斤拷锟斤拷同锟斤拷锟斤拷元锟斤拷锟叫诧拷同锟侥达拷小锟斤拷锟斤拷锟界，锟斤拷W锟斤拷要锟饺★拷i锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟饺等匡拷锟斤拷锟斤拷枚锟斤拷锟斤拷锟斤拷丫锟斤拷枪锟斤拷系锟斤拷锟绞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一转锟斤拷使锟杰讹拷原锟斤拷锟斤拷Windows锟斤拷式锟诫不锟斤拷锟斤拷锟矫ｏ拷锟接讹拷要锟斤拷锟绞叫达拷锟斤拷锟窖耙恍┦癸拷锟斤拷锟斤拷锟斤拷锟铰硷拷锟斤拷锟斤拷
系统锟斤拷锟斤拷锟斤拷一锟街★拷锟斤拷锟斤拷锟斤拷锟藉」锟斤拷锟斤拷锟斤拷味锟斤拷锟斤拷元锟斤拷锟斤拷锟斤拷为图锟截块（锟节碉拷十锟斤拷锟铰ｏ拷锟斤拷锟斤拷锟斤拷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模锟斤拷锟斤拷锟斤拷确锟叫的达拷小锟斤拷系统锟斤拷锟斤拷锟斤拷锟皆拷锟叫∪★拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟侥达拷小锟斤拷系统锟斤拷锟斤拷锟斤拷锟轿拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟绞�25锟斤拷80锟斤拷锟斤拷锟街★拷
锟斤拷元锟斤拷小
锟斤拷
要锟斤拷TextOut锟斤拷示锟斤拷锟斤拷锟斤拷锟街ｏ拷锟酵憋拷锟斤拷确锟斤拷锟斤拷锟斤拷锟斤拷锟皆拷锟叫★拷锟斤拷锟斤拷愿锟斤拷锟斤拷锟皆拷母叨锟斤拷锟斤拷锟轿伙拷锟皆拷锟斤拷锟斤拷锟斤拷校锟斤拷约锟斤拷锟斤拷锟斤拷锟皆拷目锟斤拷锟斤拷锟斤拷锟轿伙拷锟皆拷锟斤拷锟斤拷锟斤拷小锟�
系统锟斤拷锟斤拷锟斤拷锟皆拷叨群锟狡斤拷锟斤拷锟斤拷锟斤拷嵌锟斤拷伲锟斤拷锟斤拷锟斤拷锟斤拷取锟斤拷锟斤拷锟窖讹拷锟绞撅拷锟斤拷锟酵硷拷卮锟叫★拷锟絎indows锟斤拷要锟斤拷锟斤拷小锟斤拷示锟斤拷小锟斤拷640锟斤拷480锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟竭革拷喜锟斤拷800锟斤拷600锟斤拷1024锟斤拷768锟斤拷锟斤拷示锟斤拷小锟斤拷锟斤拷锟解，锟斤拷锟斤拷锟叫╋拷洗锟斤拷锟斤拷示锟竭寸，Windows锟斤拷锟斤拷使锟斤拷锟斤拷选锟斤拷同锟斤拷小锟斤拷系统锟斤拷锟藉。
锟斤拷式锟斤拷锟皆猴拷锟斤拷GetSystemMetrics锟斤拷式锟斤拷取使锟斤拷锟竭斤拷锟斤拷锟较革拷锟斤拷锟接撅拷元锟斤拷锟斤拷小锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷GetTextMetrics取锟斤拷锟斤拷锟斤拷锟叫★拷锟紾etTextMetrics锟斤拷锟斤拷装锟斤拷锟斤拷锟斤拷锟斤拷目前选取锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷锟斤拷锟揭帮拷锟斤拷锟斤拷荽锟斤拷拧锟絎indows锟斤拷锟斤拷锟街达拷小锟侥诧拷同值锟斤拷锟狡碉拷锟斤拷WINGDI.H锟叫讹拷锟斤拷锟絋EXTMETRIC锟斤拷态锟侥结构锟叫★拷TEXTMETRIC锟结构锟斤拷20锟斤拷锟斤拷位锟斤拷锟斤拷锟斤拷只使锟斤拷前锟竭革拷锟斤拷
typedef struct tagTEXTMETRIC
{
LONG tmHeight ;
LONG tmAscent ;
LONG tmDescent ;
LONG tmInternalLeading ;
LONG tmExternalLeading ;
LONG tmAveCharWidth ;
LONG tmMaxCharWidth ;
锟斤拷锟斤拷锟结构锟斤拷位
}
TEXTMETRIC, * PTEXTMETRIC ;
锟斤拷些锟斤拷位值锟侥碉拷位取锟斤拷锟窖★拷锟斤拷锟阶帮拷锟斤拷锟斤拷锟接筹拷浞绞斤拷锟斤拷锟斤拷诙锟阶帮拷锟斤拷锟斤拷锟斤拷拢锟接筹拷浞绞斤拷锟組M_TEXT锟斤拷锟斤拷锟街碉拷拇锟叫★拷锟斤拷锟酵硷拷锟轿拷锟轿伙拷锟�
要使锟斤拷GetTextMetrics锟斤拷式锟斤拷锟斤拷要锟饺讹拷锟斤拷一锟斤拷锟结构锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷为tm锟斤拷锟斤拷
TEXTMETRIC tm ;
锟斤拷锟斤拷要确锟斤拷锟斤拷锟街达拷小时锟斤拷锟斤拷取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟劫猴拷锟斤拷GetTextMetrics锟斤拷
hdc = GetDC (hwnd) ; GetTextMetrics (hdc, &tm) ; ReleaseDC (hwnd, hdc) ;
锟斤拷锟结，锟斤拷锟酵匡拷锟皆查看锟斤拷锟街尺达拷峁癸拷械锟街碉拷锟斤拷锟斤拷锌锟斤拷鼙锟斤拷锟斤拷锟斤拷械锟揭恍╋拷员锟斤拷锟斤拷锟绞癸拷谩锟�
锟斤拷锟街达拷小锟斤拷细锟斤拷
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TEXTMETRIC锟结构锟结供锟剿癸拷锟侥壳白帮拷锟斤拷锟斤拷锟斤拷锟窖★拷玫锟斤拷锟斤拷锟侥丰富锟斤拷讯锟斤拷锟斤拷锟角ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷小只锟斤拷5锟斤拷值确锟斤拷锟斤拷锟斤拷锟斤拷4锟斤拷值锟斤拷图4-3锟斤拷示锟斤拷
| 图4-3 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷元锟斤拷小锟斤拷4锟斤拷值 |
锟斤拷锟斤拷要锟斤拷值锟斤拷tmHeight锟斤拷锟斤拷锟斤拷tmAscent锟斤拷tmDescent锟侥和★拷锟斤拷锟斤拷锟斤拷值锟斤拷示锟剿伙拷准锟斤拷锟斤拷锟斤拷锟斤拷元锟斤拷锟斤拷锟斤拷锟斤拷锟竭度★拷锟斤拷锟斤拷唷癸拷锟絣eading锟斤拷指印锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟街硷拷锟斤拷锟侥空间。锟斤拷TEXTMETRIC锟结构锟叫ｏ拷锟节诧拷锟侥硷拷锟斤拷锟斤拷锟斤拷tmAscent锟叫ｏ拷锟斤拷锟揭诧拷锟絫mHeight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锟斤拷锟斤拷锟脚筹拷锟街的地凤拷锟斤拷tmInternalLeading锟斤拷位锟缴憋拷锟斤拷锟�0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斤拷锟侥革拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷员锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拧锟�
TEXTMETRIC锟结构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tmHeight值锟叫碉拷锟斤拷位tmExternalLeading锟斤拷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节猴拷锟斤拷锟斤拷元之锟斤拷目占锟斤拷小锟斤拷锟节帮拷锟斤拷锟斤拷锟斤拷锟斤拷之锟斤拷目锟较妒憋拷锟斤拷锟斤拷锟斤拷越锟斤拷锟斤拷锟斤拷锟竭斤拷锟斤拷锟街碉拷锟揭诧拷锟斤拷跃芫锟斤拷锟斤拷锟斤拷锟较低筹拷锟斤拷锟斤拷锟絫mExternalLeading锟斤拷锟斤拷为0锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷锟酵�4-3锟斤拷锟斤拷示锟斤拷锟斤拷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牵锟酵�4-3确实锟斤拷锟斤拷Windows锟斤拷640锟斤拷480锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷使锟矫碉拷系统锟斤拷锟藉。锟斤拷
TEXTMETRICS锟结构锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷元锟斤拷锟饺碉拷锟斤拷锟斤拷锟斤拷位锟斤拷锟斤拷tmAveCharWidth锟斤拷小写锟斤拷母锟斤拷权平锟斤拷锟斤拷锟饺ｏ拷锟斤拷tmMaxCharWidth锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟皆拷目锟斤拷龋锟斤拷锟斤拷锟届抖锟斤拷锟斤拷锟斤拷澹拷锟斤拷锟斤拷锟街碉拷锟斤拷锟饺的ｏ拷图4-3锟斤拷锟斤拷些值锟街憋拷为7锟斤拷14锟斤拷锟斤拷
锟斤拷锟铰的凤拷锟斤拷锟斤拷式锟斤拷锟斤拷要锟斤拷一锟斤拷锟斤拷元锟斤拷锟饺ｏ拷锟斤拷锟斤拷写锟斤拷母锟斤拷平锟斤拷锟斤拷锟饺ｏ拷锟斤拷锟斤拷锟斤拷锟絫mAveCharWidth锟斤拷锟斤拷150锟斤拷锟斤拷锟铰硷拷锟斤拷锟斤拷锟斤拷锟�
锟斤拷锟斤拷锟斤拷识锟斤拷锟斤拷系统锟斤拷锟斤拷拇锟叫∪★拷锟斤拷Windows锟斤拷执锟叫碉拷锟斤拷讯锟斤拷示锟斤拷锟侥斤拷锟斤拷锟饺ｏ拷锟斤拷某些锟斤拷锟斤拷拢锟饺★拷锟斤拷使锟斤拷锟斤拷选取锟斤拷系统锟斤拷锟斤拷拇锟叫★拷锟絎indows锟结供锟斤拷一锟斤拷锟斤拷装锟斤拷锟睫关碉拷图锟轿斤拷锟芥，锟斤拷锟斤拷式写锟斤拷锟竭伙拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟侥★拷锟斤拷要锟诫当然锟斤拷锟截猜诧拷锟斤拷锟斤拷锟叫★拷锟叫达拷锟絎indows锟斤拷式锟斤拷也锟斤拷要锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷GetTextMetrics锟斤拷式取锟斤拷锟斤拷一锟斤拷讯锟斤拷
锟斤拷式锟斤拷锟斤拷锟斤拷
锟斤拷
Windows锟斤拷锟斤拷锟结，系统锟斤拷锟斤拷拇锟叫★拷筒锟斤拷岱拷锟斤拷谋洌拷锟斤拷锟斤拷诔锟绞街达拷泄锟斤拷锟斤拷校锟斤拷锟绞叫达拷锟斤拷锟街伙拷锟揭拷锟斤拷锟揭伙拷锟紾etTexMetrics锟斤拷锟斤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写锟斤拷锟絎M_CREATE讯息时锟斤拷锟叫此猴拷锟叫ｏ拷WM_CREATE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秸的碉拷一锟斤拷讯息锟斤拷锟斤拷WinMain锟叫猴拷锟斤拷CreateWindow时锟斤拷Windows锟斤拷锟斤拷一锟斤拷WM_CREATE讯息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
锟斤拷锟斤拷要锟斤拷写一锟斤拷Windows锟斤拷式锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟街ｏ拷锟斤拷锟斤拷要锟斤拷取锟斤拷锟斤拷元锟斤拷锟饺和高度★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节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平锟斤拷锟斤拷元锟斤拷锟斤拷(cxChar)锟斤拷锟杰碉拷锟斤拷元锟竭讹拷(cyChar)锟斤拷
static int cxChar, cyChar ;
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷c锟斤拷锟斤拷锟斤拷count锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷指图锟斤拷锟斤拷锟斤拷锟斤拷x锟斤拷y锟斤拷希锟斤拷直锟街革拷锟斤拷透摺锟斤拷锟叫╋拷锟斤拷锟斤拷锟斤拷锟轿猻tatic锟斤拷态锟斤拷锟斤拷锟斤拷锟斤拷为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叫达拷锟斤拷锟斤拷锟斤拷讯息锟斤拷锟斤拷WM_PAINT锟斤拷时也应锟斤拷锟斤拷锟斤拷效锟侥★拷锟斤拷锟斤拷锟斤拷锟斤拷诤锟绞斤拷锟斤拷娑拷澹拷锟斤拷锟揭拷锟斤拷锟轿猻tatic锟斤拷
锟斤拷锟斤拷锟斤拷取锟斤拷系统锟斤拷锟斤拷锟斤拷锟皆拷锟斤拷群透叨鹊锟絎M_CREATE锟斤拷式锟诫：
case WM_CREATE: hdc = GetDC (hwnd) ; GetTextMetrics (hdc, &tm) ; cxChar = tm.tmAveCharWidth ; cyChar = tm.tmHeight + tm.tmExternalLeading ; ReleaseDC (hwnd, hdc) ; return 0 ;
注锟斤拷锟斤拷锟节硷拷锟斤拷cyChar时锟斤拷锟斤拷锟斤拷tmExternalLeading锟斤拷位锟斤拷锟斤拷然锟斤拷锟斤拷位锟斤拷系统锟斤拷锟斤拷锟斤拷为0锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷使锟斤拷锟斤拷锟街的可讹拷锟皆革拷锟矫ｏ拷锟斤拷锟皆伙拷锟斤拷应锟矫帮拷锟斤拷锟斤拷锟斤拷锟斤拷去锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷每锟斤拷cyChar图锟截就伙拷锟斤拷示一锟斤拷锟斤拷锟街★拷
锟斤拷锟结发锟街筹拷锟斤拷锟斤拷要锟斤拷示锟斤拷式锟斤拷锟斤拷锟斤拷锟街革拷锟津单碉拷锟街达拷锟斤拷锟斤拷锟节第讹拷锟铰斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟矫的癸拷锟竭ｏ拷锟缴帮拷锟斤拷printf锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷罟わ拷锟斤拷锟斤拷锟斤拷强锟斤拷锟绞癸拷锟絪printf锟斤拷Windows锟斤拷锟絪printf锟斤拷wsprintf锟斤拷锟斤拷些锟斤拷式锟斤拷printf锟斤拷锟狡ｏ拷只锟角把革拷式锟斤拷锟街达拷锟脚碉拷锟街达拷锟叫★拷然锟结，锟斤拷锟斤拷锟斤拷TextOut锟斤拷锟街达拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷稀锟斤拷浅锟斤拷锟斤拷锟斤拷锟角ｏ拷锟斤拷sprintf锟斤拷wsprintf锟斤拷锟截碉拷值锟斤拷锟斤拷锟街达拷锟侥筹拷锟饺★拷锟斤拷锟斤拷锟皆斤拷锟斤拷锟街碉拷锟斤拷莞锟絋extOut锟斤拷为iLength锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷某锟绞斤拷锟斤拷锟绞撅拷锟絯sprintf锟斤拷TextOut锟侥碉拷锟斤拷锟斤拷希锟�
int iLength ;
TCHAR szBuffer [40] ;
锟斤拷锟斤拷锟叫筹拷式
iLength = wsprintf (szBuffer, TEXT ("The sum of %i and %i is %i"),
iA, iB, iA + iB) ;
TextOut (hdc, x, y, szBuffer, iLength) ;
锟斤拷锟斤拷锟斤拷锟斤拷虻サ锟斤拷锟斤拷锟斤拷锟斤拷锟皆斤拷nLength锟侥讹拷锟斤拷值锟斤拷TextOut锟斤拷锟斤拷同一锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟接讹拷锟斤拷锟借定锟斤拷iLength锟斤拷
TextOut (hdc, x, y, szBuffer,
wsprintf (szBuffer, TEXT ("The sum of %i and %i is %i"),
iA, iB, iA + iB)) ;
锟斤拷然锟斤拷锟斤拷锟斤拷写锟斤拷锟斤拷锟斤拷锟矫匡拷锟斤拷锟斤拷锟角癸拷锟斤拷锟斤拷前锟斤拷锟斤拷一锟斤拷锟侥★拷
锟桔猴拷使锟斤拷
锟斤拷
锟斤拷锟节ｏ拷锟斤拷锟斤拷锟狡猴拷锟窖撅拷锟竭憋拷锟斤拷锟斤拷萤幕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要锟斤拷锟斤拷锟斤拷知识锟斤拷锟斤拷锟斤拷知锟斤拷锟斤拷锟斤拷锟絎M_PAINT讯息锟斤拷锟斤拷锟节硷拷取锟斤拷一锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷锟斤拷锟绞癸拷锟絋extOut锟斤拷式锟皆硷拷锟斤拷胃锟斤拷锟斤拷锟皆拷锟叫★拷锟斤拷锟斤拷锟斤拷志啵ｏ拷碌木锟斤拷锟斤拷锟绞疽伙拷锟斤拷锟斤拷锟斤拷锟侥讹拷锟斤拷锟剿★拷
锟斤拷前一锟斤拷锟斤，锟斤拷锟角达拷锟街拷锟斤拷锟絎indows锟斤拷GetSystemMetrics锟斤拷式锟斤拷取锟矫碉拷锟斤拷讯锟角猴拷锟斤拷锟斤拷锟斤拷模锟斤拷煤锟绞斤拷锟斤拷锟絎indows锟叫诧拷同锟接撅拷元锟斤拷锟侥达拷小锟斤拷讯锟斤拷锟斤拷图示锟斤拷锟轿标、锟斤拷锟斤拷锟叫和撅拷锟斤拷锟叫等★拷锟斤拷锟角的达拷小锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷式锟侥诧拷同锟斤拷锟斤拷锟斤拷锟斤拷同锟斤拷GetSystemMetrics锟斤拷锟节筹拷式锟斤拷锟斤拷锟斤拷锟阶帮拷锟斤拷薰锟酵硷拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷式锟斤拷
锟矫猴拷式锟斤拷要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斤拷锟斤拷锟斤拷锟斤拷Windows锟斤拷头锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷75锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷识锟斤拷锟街ｏ拷识锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷锟斤拷每锟斤拷锟芥本锟斤拷Windows锟侥凤拷锟斤拷锟斤拷锟斤拷锟较碉拷锟斤拷锟接ｏ拷锟斤拷Windows 1.0锟侥筹拷式写锟斤拷锟斤拷锟侥硷拷锟叫斤拷锟叫筹拷锟斤拷26锟斤拷锟斤拷锟斤拷GetSystemMetrics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酵拷锟斤拷锟斤拷遣锟斤拷锟斤拷锟街革拷锟斤拷锟酵硷拷锟皆拷锟斤拷锟叫★拷锟�
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷写一锟斤拷锟斤拷式锟斤拷锟斤拷示一些锟斤拷锟皆达拷GetSystemMetrics锟斤拷锟斤拷锟斤拷取锟矫碉拷锟斤拷讯锟斤拷锟斤拷示锟斤拷式为每锟斤拷锟接撅拷元锟斤拷一锟叫★拷锟斤拷锟斤拷锟斤拷墙锟斤拷锟揭伙拷锟斤拷锟酵凤拷锟斤拷锟斤拷锟斤拷诒锟酵凤拷锟斤拷锟斤拷卸锟斤拷锟揭伙拷锟斤拷峁癸拷锟斤拷校锟斤拷私峁癸拷锟斤拷锟紾etSystemMetrics锟斤拷锟斤拷锟斤拷应锟斤拷Windows锟斤拷头锟斤拷锟斤拷识锟斤拷锟街和猴拷锟斤拷锟斤拷锟斤拷锟截碉拷每锟斤拷值锟斤拷应锟斤拷锟街达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷一些锟斤拷锟斤拷头锟斤拷锟斤拷锟斤拷为SYSMETS.H锟斤拷锟斤拷锟绞�4-1锟斤拷示锟斤拷
锟斤拷式4-1 SYSMETS.H
/*---------------------------------------------------------
SYSMETS.H -- System metrics display structure
-----------------------------------------------------------*/
#define NUMLINES ((int) (sizeof sysmetrics / sizeof sysmetrics [0]))
struct
{
int Index ;
TCHAR * szLabel ;
TCHAR * szDesc ;
}
sysmetrics [] =
{
SM_CXSCREEN, TEXT ("SM_CXSCREEN"),
TEXT ("Screen width in pixels"),
SM_CYSCREEN, TEXT ("SM_CYSCREEN"),
TEXT ("Screen height in pixels"),
SM_CXVSCROLL, TEXT ("SM_CXVSCROLL"),
TEXT ("Vertical scroll width"),
SM_CYHSCROLL, TEXT ("SM_CYHSCROLL"),
TEXT ("Horizontal scroll height"),
SM_CYCAPTION, TEXT ("SM_CYCAPTION"),
TEXT ("Caption bar height"),
SM_CXBORDER, TEXT ("SM_CXBORDER"),
TEXT ("Window border width"),
SM_CYBORDER, TEXT ("SM_CYBORDER"),
TEXT ("Window border height"),
SM_CXFIXEDFRAME,TEXT ("SM_CXFIXEDFRAME"),
TEXT ("Dialog window frame width"),
SM_CYFIXEDFRAME,TEXT ("SM_CYFIXEDFRAME"),
TEXT ("Dialog window frame height"),
SM_CYVTHUMB, TEXT ("SM_CYVTHUMB"),
TEXT ("Vertical scroll thumb height"),
SM_CXHTHUMB, TEXT ("SM_CXHTHUMB"),
TEXT ("Horizontal scroll thumb width"),
SM_CXICON, TEXT ("SM_CXICON"),
TEXT ("Icon width"),
SM_CYICON, TEXT ("SM_CYICON"),
TEXT ("Icon height"),
SM_CXCURSOR, TEXT ("SM_CXCURSOR"),
TEXT ("Cursor width"),
SM_CYCURSOR, TEXT ("SM_CYCURSOR"),
TEXT ("Cursor height"),
SM_CYMENU, TEXT ("SM_CYMENU"),
TEXT ("Menu bar height"),
SM_CXFULLSCREEN,TEXT ("SM_CXFULLSCREEN"),
TEXT ("Full screen client area width"),
SM_CYFULLSCREEN,TEXT ("SM_CYFULLSCREEN"),
TEXT ("Full screen client area height"),
SM_CYKANJIWINDOW,TEXT ("SM_CYKANJIWINDOW"),
TEXT ("Kanji window height"),
SM_MOUSEPRESENT, TEXT ("SM_MOUSEPRESENT"),
TEXT ("Mouse present flag"),
SM_CYVSCROLL, TEXT ("SM_CYVSCROLL"),
TEXT ("Vertical scroll arrow height"),
SM_CXHSCROLL, TEXT ("SM_CXHSCROLL"),
TEXT ("Horizontal scroll arrow width"),
SM_DEBUG, TEXT ("SM_DEBUG"),
TEXT ("Debug version flag"),
SM_SWAPBUTTON, TEXT ("SM_SWAPBUTTON"),
TEXT ("Mouse buttons swapped flag"),
SM_CXMIN, TEXT ("SM_CXMIN"),
TEXT ("Minimum window width"),
SM_CYMIN, TEXT ("SM_CYMIN"),
TEXT ("Minimum window height"),
SM_CXSIZE, TEXT ("SM_CXSIZE"),
TEXT ("Min/Max/Close button width"),
SM_CYSIZE, TEXT ("SM_CYSIZE"),
TEXT ("Min/Max/Close button height"),
SM_CXSIZEFRAME, TEXT ("SM_CXSIZEFRAME"),
TEXT ("Window sizing frame width"),
SM_CYSIZEFRAME, TEXT ("SM_CYSIZEFRAME"),
TEXT ("Window sizing frame height"),
SM_CXMINTRACK, TEXT ("SM_CXMINTRACK"),
TEXT ("Minimum window tracking width"),
SM_CYMINTRACK, TEXT ("SM_CYMINTRACK"),
TEXT ("Minimum window tracking height"),
SM_CXDOUBLECLK, TEXT ("SM_CXDOUBLECLK"),
TEXT ("Double click x tolerance"),
SM_CYDOUBLECLK, TEXT ("SM_CYDOUBLECLK"),
TEXT ("Double click y tolerance"),
SM_CXICONSPACING,TEXT ("SM_CXICONSPACING"),
TEXT ("Horizontal icon spacing"),
SM_CYICONSPACING,TEXT ("SM_CYICONSPACING"),
TEXT ("Vertical icon spacing"),
SM_MENUDROPALIGNMENT, TEXT ("SM_MENUDROPALIGNMENT"),
TEXT ("Left or right menu drop"),
SM_PENWINDOWS, TEXT ("SM_PENWINDOWS"),
TEXT ("Pen extensions installed"),
SM_DBCSENABLED, TEXT ("SM_DBCSENABLED"),
TEXT ("Double-Byte Char Set enabled"),
SM_CMOUSEBUTTONS, TEXT ("SM_CMOUSEBUTTONS"),
TEXT ("Number of mouse buttons"),
SM_SECURE, TEXT ("SM_SECURE"),
TEXT ("Security present flag"),
SM_CXEDGE, TEXT ("SM_CXEDGE"),
TEXT ("3-D border width"),
SM_CYEDGE, TEXT ("SM_CYEDGE"),
TEXT ("3-D border height"),
SM_CXMINSPACING, TEXT ("SM_CXMINSPACING"),
TEXT ("Minimized window spacing width"),
SM_CYMINSPACING, TEXT ("SM_CYMINSPACING"),
TEXT ("Minimized window spacing height"),
SM_CXSMICON, TEXT ("SM_CXSMICON"),
TEXT ("Small icon width"),
SM_CYSMICON, TEXT ("SM_CYSMICON"),
TEXT ("Small icon height"),
SM_CYSMCAPTION, TEXT ("SM_CYSMCAPTION"),
TEXT ("Small caption height"),
SM_CXSMSIZE, TEXT ("SM_CXSMSIZE"),
TEXT ("Small caption button width"),
SM_CYSMSIZE, TEXT ("SM_CYSMSIZE"),
TEXT ("Small caption button height"),
SM_CXMENUSIZE, TEXT ("SM_CXMENUSIZE"),
TEXT ("Menu bar button width"),
SM_CYMENUSIZE, TEXT ("SM_CYMENUSIZE"),
TEXT ("Menu bar button height"),
SM_ARRANGE, TEXT ("SM_ARRANGE"),
TEXT ("How minimized windows arranged"),
SM_CXMINIMIZED, TEXT ("SM_CXMINIMIZED"),
TEXT ("Minimized window width"),
SM_CYMINIMIZED, TEXT ("SM_CYMINIMIZED"),
TEXT ("Minimized window height"),
SM_CXMAXTRACK, TEXT ("SM_CXMAXTRACK"),
TEXT ("Maximum draggable width"),
SM_CYMAXTRACK, TEXT ("SM_CYMAXTRACK"),
TEXT ("Maximum draggable height"),
SM_CXMAXIMIZED, TEXT ("SM_CXMAXIMIZED"),
TEXT ("Width of maximized window"),
SM_CYMAXIMIZED, TEXT ("SM_CYMAXIMIZED"),
TEXT ("Height of maximized window"),
SM_NETWORK, TEXT ("SM_NETWORK"),
TEXT ("Network present flag"),
SM_CLEANBOOT, TEXT ("SM_CLEANBOOT"),
TEXT ("How system was booted"),
SM_CXDRAG, TEXT ("SM_CXDRAG"),
TEXT ("Avoid drag x tolerance"),
SM_CYDRAG, TEXT ("SM_CYDRAG"),
TEXT ("Avoid drag y tolerance"),
SM_SHOWSOUNDS, TEXT ("SM_SHOWSOUNDS"),
TEXT ("Present sounds visually"),
SM_CXMENUCHECK, TEXT ("SM_CXMENUCHECK"),
TEXT ("Menu check-mark width"),
SM_CYMENUCHECK, TEXT ("SM_CYMENUCHECK"),
TEXT ("Menu check-mark height"),
SM_SLOWMACHINE, TEXT ("SM_SLOWMACHINE"),
TEXT ("Slow processor flag"),
SM_MIDEASTENABLED, TEXT ("SM_MIDEASTENABLED"),
TEXT ("Hebrew and Arabic enabled flag"),
SM_MOUSEWHEELPRESENT, TEXT ("SM_MOUSEWHEELPRESENT"),
TEXT ("Mouse wheel present flag"),
SM_XVIRTUALSCREEN, TEXT ("SM_XVIRTUALSCREEN"),
TEXT ("Virtual screen x origin"),
SM_YVIRTUALSCREEN, TEXT ("SM_YVIRTUALSCREEN"),
TEXT ("Virtual screen y origin"),
SM_CXVIRTUALSCREEN, TEXT ("SM_CXVIRTUALSCREEN"),
TEXT ("Virtual screen width"),
SM_CYVIRTUALSCREEN, TEXT ("SM_CYVIRTUALSCREEN"),
TEXT ("Virtual screen height"),
SM_CMONITORS, TEXT ("SM_CMONITORS"),
TEXT ("Number of monitors"),
SM_SAMEDISPLAYFORMAT, TEXT ("SM_SAMEDISPLAYFORMAT"),
TEXT ("Same color format flag")
} ;
锟斤拷示锟斤拷讯锟侥筹拷式锟斤拷锟斤拷为SYSMETS1锟斤拷SYSMETS1.C锟斤拷原始锟斤拷锟斤拷锟绞�4-2锟斤拷示锟斤拷锟斤拷锟节达拷锟斤拷锟斤拷锟绞斤拷肟达拷锟斤拷锟斤拷锟斤拷锟斤拷锟较わ拷锟絎inMain锟叫的筹拷式锟斤拷实锟斤拷锟斤拷锟斤拷HELLOWIN锟叫的筹拷式锟斤拷锟斤拷同锟斤拷锟斤拷锟斤拷WndProc锟叫的大部分筹拷式锟诫都锟窖撅拷锟斤拷锟桔癸拷锟剿★拷
锟斤拷式4-2 SYSMETS1.C
/*------------------------------------------------------------------
SYSMETS1.C -- System Metrics Display Program No. 1
(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 ("SysMets1") ;
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 ("Get System Metrics No. 1"),
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 ;
HDC hdc ;
int i ;
PAINTSTRUCT ps ;
TCHAR szBuffer [10] ;
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,
sysmetrics[i].szLabel,
lstrlen (sysmetrics[i].szLabel)) ;
TextOut (hdc, 22 * cxCaps, cyChar * i,
sysmetrics[i].szDesc,
lstrlen (sysmetrics[i].szDesc)) ;
SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;
TextOut (hdc, 22 * cxCaps + 40 * cxChar, cyChar * i, 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) ;
}
图4-4锟斤拷示锟斤拷锟节憋拷准VGA锟斤拷执锟叫碉拷SYSMETS1锟斤拷锟节筹拷式锟斤拷示锟斤拷锟斤拷锟角帮拷锟斤拷锌锟斤拷钥锟斤拷锟斤拷锟接┠伙拷锟斤拷锟斤拷锟�640锟斤拷图锟截ｏ拷萤幕锟竭讹拷锟斤拷480锟斤拷图锟截ｏ拷锟斤拷锟斤拷锟斤拷值锟皆硷拷锟斤拷式锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷值锟斤拷锟杰伙拷锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷态锟侥诧拷同锟斤拷锟斤拷同锟斤拷
锟斤拷
| 图4-4 SYSMETS1锟斤拷锟斤拷示 |
SYSMETS1.C锟接达拷讯息锟斤拷锟斤拷锟斤拷式
锟斤拷
SYSMETS1.C锟斤拷式锟叫碉拷WndProc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讯息锟斤拷WM_CREATE锟斤拷WM_PAINT锟斤拷WM_DESTROY锟斤拷WM_DESTROY讯息锟侥达拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷碌锟紿ELLOWIN锟斤拷式锟斤拷同锟斤拷
WM_CREATE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秸碉拷锟侥碉拷一锟斤拷讯息锟斤拷锟斤拷CreateWindow锟斤拷式锟斤拷锟斤拷锟接达拷时锟斤拷Windows锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷诖锟斤拷锟絎M_CREATE讯息时锟斤拷SYSMETS1锟斤拷锟斤拷GetDC取锟斤拷锟接达拷锟斤拷装锟斤拷锟斤拷锟捷ｏ拷锟斤拷锟斤拷锟斤拷GetTextMetrics取锟斤拷锟节讹拷系统锟斤拷锟斤拷锟斤拷锟斤拷执锟叫★拷锟絊YSMETS1锟斤拷平锟斤拷锟斤拷元锟斤拷锟饺憋拷锟斤拷锟斤拷cxChar锟叫ｏ拷锟斤拷锟斤拷元锟斤拷锟杰高度ｏ拷锟斤拷锟斤拷锟解部锟斤拷啵╋拷锟斤拷锟斤拷锟絚yChar锟叫★拷
SYSMETS1锟斤拷锟斤拷锟斤拷写锟斤拷母锟斤拷平锟斤拷锟斤拷锟饺憋拷锟斤拷锟节撅拷态锟斤拷锟斤拷cxCaps锟叫★拷锟斤拷於固讹拷锟斤拷锟饺碉拷锟斤拷锟藉， cxCaps锟斤拷锟絚xChar锟斤拷锟斤拷於可憋拷锟斤拷锟斤拷锟斤拷澹琧xCaps锟借定为cxChar锟斤拷锟斤拷150锟斤拷锟斤拷锟斤拷於可憋拷锟斤拷锟斤拷锟斤拷澹琓EXTMETRIC锟结构锟叫碉拷tmPitchAndFamily锟斤拷位锟侥碉拷位元为1锟斤拷锟斤拷於固讹拷锟斤拷锟斤拷锟斤拷锟藉，锟斤拷值为0锟斤拷 SYSMETS1使锟斤拷锟斤拷锟轿辉拷锟絚xChar锟斤拷锟斤拷cxCaps锟斤拷
cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2 ;
SYSMETS1锟节达拷锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟节硷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酵拷锟斤拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷群锟斤拷锟紹eginPaint取锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚ｏ拷然锟斤拷锟斤拷一锟斤拷for锟斤拷锟斤拷锟斤拷SYSMETS.H锟叫讹拷锟斤拷锟絪ysmetrics锟结构锟斤拷每一锟叫斤拷锟叫伙拷圈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锟斤拷式锟斤拷示锟斤拷锟斤拷锟矫恳伙拷校锟絋extOut锟侥碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟借定为锟斤拷
cyChar * i
锟斤拷锟斤拷锟斤拷锟街甘撅拷锟斤拷执锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷蚨ゲ锟斤拷锟酵硷拷锟轿伙拷谩锟�
锟斤拷一锟斤拷TextOut锟斤拷锟斤拷锟节碉拷一锟斤拷锟斤拷示锟剿达拷写识锟斤拷锟街★拷TextOut锟侥第讹拷锟斤拷锟斤拷锟斤拷锟斤拷0锟斤拷锟斤拷锟斤拷说锟斤拷锟街达拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷缘锟斤拷始锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷锟斤拷sysmetrics锟结构锟斤拷szLabel锟斤拷位锟斤拷锟斤拷使锟斤拷Windows锟斤拷式lstrlen锟斤拷锟斤拷锟斤拷锟街达拷锟侥筹拷锟饺ｏ拷锟斤拷锟斤拷TextOut锟斤拷要锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷
锟节讹拷锟斤拷TextOut锟斤拷锟斤拷锟斤拷示锟剿讹拷系统锟竭达拷值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斤拷锟絪ysmetrics锟结构锟斤拷szDesc锟斤拷位锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拢锟絋extOut锟侥第讹拷锟斤拷锟斤拷锟斤拷锟借定为锟斤拷
22 * cxCaps
锟斤拷一锟斤拷锟斤拷示锟斤拷锟筋长锟侥达拷写识锟斤拷锟斤拷锟斤拷20锟斤拷锟斤拷元锟斤拷锟斤拷说诙锟斤拷斜锟斤拷锟斤拷诘锟揭伙拷锟斤拷锟斤拷挚锟酵凤拷锟斤拷锟�20 锟斤拷 cxCaps锟斤拷锟斤拷始锟斤拷锟斤拷使锟斤拷22锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷之锟斤拷锟揭伙拷锟斤拷锟斤拷目占洹�
锟斤拷锟斤拷锟斤拷TextOut锟斤拷锟斤拷锟斤拷示锟斤拷GetSystemMetrics锟斤拷式取锟矫碉拷锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷酶锟绞斤拷锟斤拷锟斤拷叶锟斤拷锟斤拷锟斤拷值锟斤拷些锟斤拷锟街★拷锟斤拷0锟斤拷9锟斤拷锟斤拷锟街撅拷锟斤拷锟斤拷同锟侥匡拷锟饺ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷缺瓤崭锟斤拷锟饺达拷锟斤拷值锟斤拷锟皆憋拷一锟斤拷锟斤拷锟街匡拷锟斤拷锟斤拷锟皆诧拷同锟斤拷锟斤拷值应锟矫从诧拷同锟侥猴拷锟斤拷位锟矫匡拷始锟斤拷
锟斤拷么锟斤拷锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷执锟斤拷锟斤拷锟斤拷锟酵硷拷锟轿伙拷茫锟斤拷锟斤拷锟斤拷锟街革拷锟斤拷执锟斤拷目锟绞嘉伙拷茫锟斤拷源锟斤拷锟斤拷叶锟斤拷锟斤拷锟街碉拷锟斤拷欠锟斤拷锟斤拷锟斤拷一些锟截ｏ拷锟斤拷SetTextAlign锟斤拷式锟酵匡拷锟斤拷锟斤拷锟斤拷锟斤拷一锟姐。锟斤拷SYSMETS1锟斤拷锟叫ｏ拷
SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;
之锟结，锟斤拷锟斤拷锟斤拷锟斤拷TextOut锟斤拷式锟斤拷锟斤拷锟疥将指锟斤拷锟街达拷锟斤拷锟斤拷锟较角ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟较角★拷
锟斤拷示锟斤拷锟斤拷锟斤拷TextOut锟斤拷式锟侥第讹拷锟斤拷锟斤拷锟斤拷锟借定为锟斤拷
22 * cxCaps + 40 * cxChar
值40*cxChar锟斤拷锟斤拷锟剿第讹拷锟叫的匡拷锟饺和碉拷锟斤拷锟叫的匡拷锟饺★拷锟斤拷TextOut锟斤拷式之锟结，锟斤拷一锟斤拷锟斤拷SetTextAlign锟侥猴拷锟叫斤拷锟斤拷锟诫方式锟借定锟斤拷锟斤拷通锟斤拷式锟斤拷锟皆斤拷锟斤拷锟铰次伙拷圈锟斤拷
锟秸间不锟斤拷
锟斤拷
锟斤拷SYSMETS1锟斤拷式锟叫达拷锟斤拷锟斤拷一锟斤拷锟斤拷锟窖达拷锟斤拷锟斤拷锟斤拷锟解：锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷萤幕锟斤拷锟竭斤拷锟斤拷锟饺碉拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷薹锟斤拷锟斤拷锟较低筹拷叨锟斤拷斜锟斤拷锟斤拷锟斤拷峒革拷小锟斤拷锟斤拷锟接达拷太窄锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷
SYSMETS1锟斤拷知锟斤拷锟斤拷锟斤拷锟斤拷狻ｏ拷锟斤拷锟斤拷锟斤拷蔷突锟斤拷锟绞疽伙拷锟窖断拷锟斤拷锟剿碉拷锟斤拷锟角革拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟街拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷卸锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷始锟斤拷锟斤拷锟斤拷郑锟斤拷锟斤拷锟斤拷锟絎indows锟矫硷拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷撞锟斤拷锟斤拷锟斤拷荨锟�
锟斤拷然锟斤拷锟斤拷懿锟斤拷锟斤拷搿Ｎ拷私锟斤拷锟斤拷锟斤拷锟斤拷猓拷锟斤拷堑牡锟揭伙拷锟斤拷锟斤拷锟斤拷锟饺凤拷锟斤拷锟绞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锟斤拷锟斤拷锟捷★拷
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锟斤拷
锟斤拷锟斤拷锟绞癸拷霉锟斤拷锟斤拷械锟絎indows应锟矫筹拷式锟斤拷锟斤拷锟杰会发锟斤拷锟接达拷锟侥尺达拷浠拷锟斤拷锟斤拷哟锟斤拷锟斤拷时锟斤拷锟劫讹拷锟接达拷只锟叫憋拷锟斤拷锟叫诧拷锟斤拷没锟叫癸拷锟杰憋拷锟斤拷锟斤拷锟斤拷示锟斤拷锟津几猴拷占锟斤拷锟斤拷锟斤拷锟斤拷萤幕锟斤拷锟斤拷一锟斤拷锟斤拷说锟斤拷锟绞撅拷锟斤拷锟侥尺达拷锟斤拷锟酵拷锟斤拷锟絊M_CXFULLSCREEN锟斤拷SM_CYFULLSCREEN为锟斤拷锟斤拷锟斤拷锟斤拷GetSystemMetrics锟斤拷锟斤拷谩锟斤拷哟锟斤拷锟斤拷锟叫★拷叽锟斤拷锟皆猴拷小锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟节ｏ拷锟斤拷锟斤拷锟斤拷说锟斤拷示锟斤拷锟斤拷锟剿★拷
锟斤拷锟斤拷锟揭伙拷拢锟斤拷锟斤拷锟绞癸拷锟紾etClientRect锟斤拷式锟斤拷取锟斤拷锟斤拷示锟斤拷锟斤拷拇锟叫★拷锟绞癸拷锟斤拷锟斤拷锟斤拷式没锟斤拷什么锟斤拷锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷每锟斤拷要使锟斤拷锟斤拷讯时锟斤拷去锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷没锟斤拷效锟绞的★拷确锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷锟叫★拷母锟斤拷梅锟斤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写锟斤拷锟絎M_SIZE讯息锟斤拷锟斤拷锟接达拷锟斤拷小锟侥憋拷时锟斤拷Windows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_SIZE讯息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lParam锟斤拷锟斤拷锟侥碉拷锟斤拷锟斤拷锟叫帮拷锟斤拷锟斤拷示锟斤拷锟斤拷目锟斤拷龋锟斤拷锟斤拷锟斤拷锟斤拷邪锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥高度★拷要锟斤拷锟斤拷锟斤拷些锟竭寸，锟斤拷要锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟叫讹拷锟斤拷锟斤拷锟斤拷锟斤拷态锟斤拷锟斤拷锟斤拷
static int cxClient, cyClient ;
锟斤拷cxChar锟斤拷cyChar锟斤拷锟狡ｏ拷锟斤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节讹拷锟斤拷为锟斤拷态锟斤拷锟斤拷锟斤拷锟斤拷为锟斤拷锟斤拷锟结处锟斤拷锟斤拷锟斤拷讯息时锟斤拷锟矫碉拷锟斤拷锟角★拷锟斤拷锟斤拷WM_SIZE锟侥凤拷锟斤拷锟斤拷锟铰ｏ拷
case WM_SIZE: cxClient = LOWORD (lParam) ; cyClient = HIWORD (lParam) ; return 0 ;
实锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷每锟斤拷Windows锟斤拷式锟叫匡拷锟斤拷锟斤拷锟狡的筹拷式锟诫。LOWORD锟斤拷HIWORD锟睫硷拷锟斤拷Windows锟斤拷头锟斤拷锟斤拷WINDEF.H锟叫讹拷锟藉。锟斤拷些锟睫硷拷锟侥讹拷锟藉看锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
#define LOWORD(l) ((WORD)(l)) #define HIWORD(l) ((WORD)(((DWORD)(l) >> 16) & 0xFFFF))
锟斤拷锟斤拷锟斤拷锟睫硷拷锟斤拷锟斤拷WORD值锟斤拷16位元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围锟斤拷0锟斤拷0xFFFF锟斤拷锟斤拷一锟姐，锟斤拷锟斤拷些值锟斤拷锟斤拷锟斤拷32位元锟叫猴拷锟斤拷锟斤拷锟叫★拷锟斤拷筒锟斤拷锟角ｏ拷锟斤拷锟斤拷魏锟阶拷锟斤拷锟斤拷猓拷锟绞癸拷锟斤拷锟叫┲碉拷锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷魏渭锟斤拷锟斤拷锟斤拷锟斤拷使锟矫★拷
锟斤拷锟斤拷锟斤拷Windows锟斤拷式锟叫ｏ拷WM_SIZE讯息锟斤拷然锟斤拷锟斤拷一锟斤拷WM_PAINT讯息锟斤拷为什么锟截ｏ拷锟斤拷为锟斤拷锟斤拷锟角讹拷锟斤拷锟接达拷锟斤拷锟绞敝革拷锟斤拷哟锟斤拷锟斤拷锟斤拷式为锟斤拷
CS_HREDRAW | CS_VREDRAW
锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟絎indows锟斤拷锟斤拷锟剿斤拷锟斤拷叽锟街憋拷锟叫★拷锟斤拷锟斤拷谋洌� 锟斤拷强锟狡革拷锟斤拷锟斤拷示锟斤拷锟斤拷
锟斤拷锟斤拷锟铰癸拷式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绞撅拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷锟斤拷锟�
cyClient / cyChar
锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥高讹拷太小锟斤拷锟斤拷锟睫凤拷锟斤拷示一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷元锟斤拷锟斤拷锟斤拷锟绞斤拷慕锟斤拷锟斤拷锟斤拷为0锟斤拷锟斤拷锟狡地ｏ拷锟斤拷锟斤拷示锟斤拷锟斤拷锟剿斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷小写锟斤拷元锟侥斤拷锟斤拷锟斤拷目为锟斤拷
cxClient / cxChar
锟斤拷锟斤拷诖锟斤拷锟絎M_CREATE讯息锟斤拷锟斤拷锟节硷拷取锟斤拷cxChar锟斤拷cyChar锟斤拷锟斤拷锟矫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟姐公式锟叫伙拷锟斤拷直锟�0锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絎inMain锟斤拷锟斤拷CreateWindow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一锟斤拷WM_CREATE讯息锟斤拷锟斤拷WinMain锟斤拷锟斤拷ShowWindow之锟斤拷锟斤拷盏锟斤拷锟揭伙拷锟絎M_CREATE讯息锟斤拷锟斤拷时cxChar锟斤拷cyChar锟窖撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥凤拷锟斤拷值锟剿★拷
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斤拷锟斤拷锟斤拷锟叫碉拷锟斤拷锟捷ｏ拷锟斤拷么锟斤拷知锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷拇锟叫≈伙拷锟轿癸拷锟斤拷锟斤拷峁╋拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷诰锟斤拷锟斤拷锟斤拷值牡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锟斤拷锟斤拷锟斤拷锟斤拷锟絎indows应锟矫筹拷式锟斤拷锟斤拷悉锟斤拷锟酵很匡拷锟斤拷知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揭癸拷谩锟斤拷锟斤拷锟斤拷小锟斤拷锟�
锟斤拷锟斤拷锟斤拷
锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷图锟斤拷使锟斤拷锟竭斤拷锟斤拷锟斤拷锟斤拷玫墓锟斤拷锟街伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷茫锟斤拷锟斤拷锟斤拷峁╋拷撕芎玫锟斤拷泳锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞癸拷镁锟斤拷锟斤拷锟斤拷锟绞撅拷魏味锟斤拷锟�--锟斤拷锟斤拷锟斤拷锟斤拷锟街★拷图锟轿★拷锟斤拷锟斤拷锟斤拷锟较匡拷锟铰硷拷锟酵硷拷锟斤拷锟斤拷锟斤拷页锟斤拷只要锟斤拷锟斤拷锟斤拷目占涑拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷锟斤拷峁╋拷目占洌拷涂锟斤拷锟绞癸拷镁锟斤拷锟斤拷小锟�
锟斤拷锟斤拷锟叫硷拷锟叫达拷直锟斤拷锟斤拷模锟斤拷锟斤拷锟斤拷锟斤拷贫锟斤拷锟斤拷锟揭诧拷锟剿斤拷锟斤拷锟侥ｏ拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟斤拷使锟斤拷锟竭匡拷锟斤拷使锟矫伙拷锟斤拷锟节撅拷锟斤拷锟斤拷锟斤拷锟剿的硷拷头锟较伙拷锟斤拷锟节硷拷头之锟斤拷锟斤拷锟斤拷锟斤拷械锟揭伙拷拢锟斤拷锟绞憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷椤癸拷诰锟斤拷锟斤拷锟斤拷诘锟斤拷贫锟轿伙拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟窖讹拷锟斤拷锟斤拷锟斤拷募锟斤拷械慕锟斤拷锟斤拷锟斤拷位锟矫成憋拷锟斤拷锟斤拷使锟斤拷锟斤拷也锟斤拷锟斤拷锟矫伙拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟介到锟截讹拷锟斤拷位锟矫★拷图4-5锟斤拷示锟剿达拷直锟斤拷锟斤拷锟叫的斤拷锟斤拷锟矫凤拷锟斤拷
锟斤拷
| 图4-5 锟斤拷直锟斤拷锟斤拷锟斤拷 |
锟斤拷时锟斤拷锟斤拷式写锟斤拷锟竭对撅拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷猓拷锟轿拷锟斤拷堑墓鄣锟斤拷锟绞癸拷锟斤拷叩墓鄣悴煌拷锟绞癸拷锟斤拷锟斤拷锟斤拷戮锟斤拷锟斤拷锟斤拷肟达拷锟斤拷募锟斤拷锟斤拷锟斤拷锟侥诧拷锟街ｏ拷锟斤拷锟角ｏ拷锟斤拷式实锟斤拷锟斤拷锟角斤拷锟侥硷拷锟斤拷锟斤拷锟斤拷示锟接达拷锟斤拷锟斤拷锟狡讹拷锟斤拷Windows锟侥硷拷锟酵憋拷头锟斤拷锟斤拷识锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷锟竭的观点：锟斤拷锟较撅拷锟斤拷锟斤拷味锟斤拷锟斤拷锟侥硷拷锟侥匡拷头锟狡讹拷锟斤拷锟斤拷锟铰撅拷锟斤拷锟斤拷味锟斤拷锟斤拷锟侥硷拷尾锟斤拷锟狡讹拷锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷应锟矫筹拷式锟叫帮拷锟斤拷水平锟斤拷锟竭达拷直锟侥撅拷锟斤拷锟叫ｏ拷锟斤拷式写锟斤拷锟斤拷只锟斤拷要锟斤拷CreateWindow锟侥碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫帮拷锟斤拷锟接达拷锟斤拷式锟斤拷WS锟斤拷识锟斤拷锟斤拷WS_VSCROLL锟斤拷锟斤拷直锟斤拷锟斤拷锟斤拷锟斤拷/锟斤拷WS_HSCROLL锟斤拷水平锟斤拷锟斤拷锟斤拷锟斤拷锟缴★拷锟斤拷些锟斤拷锟斤拷锟斤拷通锟斤拷锟斤拷锟斤拷锟接达拷锟斤拷锟揭诧拷锟酵底诧拷锟斤拷锟斤拷展为锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟饺★拷锟斤拷示锟斤拷锟津不帮拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷占锟捷的空间。锟斤拷锟斤拷囟锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷龋锟斤拷锟街憋拷锟斤拷锟斤拷械目锟斤拷群锟剿斤拷锟斤拷锟斤拷械母叨锟斤拷呛愣拷摹锟斤拷锟斤拷锟斤拷要锟斤拷些值锟斤拷锟斤拷锟斤拷使锟斤拷GetSystemMetrics锟斤拷锟斤拷锟斤拷取锟矫ｏ拷锟斤拷前锟斤拷某锟绞斤拷锟斤拷锟斤拷锟斤拷锟�
Windows锟斤拷锟斤拷锟斤拷锟皆撅拷锟斤拷锟叫碉拷锟斤拷锟叫伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷牵锟斤拷哟锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷远锟斤拷募锟斤拷探锟斤拷妗ｏ拷锟斤拷锟斤拷锟斤拷锟轿憋拷锟斤拷锟斤拷锟缴撅拷锟斤拷锟斤拷锟杰ｏ拷锟斤拷锟斤拷锟斤拷峁╋拷夥斤拷锟侥筹拷式锟诫（锟斤拷锟角斤拷锟斤拷锟斤拷一锟斤拷锟斤拷一锟斤拷锟芥本锟斤拷SYSMETS锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷一锟姐）锟斤拷
锟斤拷锟斤拷锟叫的凤拷围锟斤拷位锟斤拷
锟斤拷
每锟斤拷锟斤拷锟斤拷锟叫撅拷锟斤拷一锟斤拷锟斤拷氐摹锟斤拷锟轿э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直锟斤拷锟斤拷锟斤拷小值锟斤拷锟斤拷锟街碉拷锟斤拷汀锟轿伙拷谩锟斤拷锟斤拷锟斤拷蔷锟斤拷锟斤拷锟斤拷锟斤拷诖朔锟轿э拷诘锟轿伙拷茫锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷诰锟斤拷锟斤拷械亩锟斤拷锟斤拷锟斤拷锟斤拷蟛浚锟绞憋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟斤拷锟角凤拷围锟斤拷锟斤拷小值锟斤拷锟节撅拷锟斤拷锟叫的底诧拷锟斤拷锟斤拷锟揭诧拷锟斤拷时锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟斤拷欠锟轿э拷锟斤拷锟斤拷值锟斤拷
锟斤拷锟节讹拷锟斤拷锟斤拷拢锟斤拷锟斤拷锟斤拷械姆锟轿э拷谴锟�0锟斤拷锟斤拷锟斤拷锟斤拷锟襟部ｏ拷锟斤拷100锟斤拷锟阶诧拷锟斤拷锟揭诧拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷围锟侥憋拷为锟斤拷锟斤拷锟斤拷於筹拷式锟斤拷锟斤拷值也锟角猴拷锟斤拷锟阶的ｏ拷
SetScrollRange (hwnd, iBar, iMin, iMax, bRedraw) ;
锟斤拷锟斤拷iBar为SB_VERT锟斤拷锟斤拷SB_HORZ锟斤拷iMin锟斤拷iMax锟街憋拷锟角凤拷围锟斤拷锟斤拷小值锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷锟斤拷要Windows锟斤拷锟斤拷锟铰凤拷围锟截伙拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷bRedraw为TRUE锟斤拷锟斤拷锟斤拷诤锟斤拷锟絊etScrollRange锟结，锟斤拷锟斤拷锟斤拷影锟斤拷锟斤拷锟斤拷锟轿伙拷玫锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟接︼拷媒锟絙Redraw锟借定为FALSE锟皆憋拷锟斤拷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轿伙拷锟斤拷锟斤拷锟斤拷锟缴拷锟斤拷锟斤拷锟街碉拷锟斤拷锟斤拷纾拷锟轿�0锟斤拷4锟侥撅拷锟斤拷锟叫撅拷锟斤拷5锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟矫ｏ拷锟斤拷图4-6锟斤拷示锟斤拷
锟斤拷
| 图4-6 锟斤拷锟斤拷5锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟矫的撅拷锟斤拷锟斤拷 |
锟斤拷锟斤拷锟斤拷使锟斤拷SetScrollPos锟节撅拷锟斤拷锟叫凤拷围锟斤拷锟斤拷锟斤拷锟铰的撅拷锟斤拷锟斤拷锟斤拷位锟矫ｏ拷
SetScrollPos (hwnd, iBar, iPos, bRedraw) ;
锟斤拷锟斤拷iPos锟斤拷锟斤拷位锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷iMin锟斤拷iMax锟侥凤拷围锟节★拷Windows锟结供锟斤拷锟斤拷锟狡的猴拷式锟斤拷GetScrollRange锟斤拷GetScrollPos锟斤拷锟斤拷取锟矫撅拷锟斤拷锟叫碉拷目前锟斤拷围锟斤拷位锟矫★拷
锟节筹拷式锟斤拷使锟矫撅拷锟斤拷锟斤拷时锟斤拷锟斤拷式写锟斤拷锟斤拷锟斤拷Windows锟斤拷同锟斤拷锟斤拷维锟斤拷锟斤拷锟斤拷锟斤拷锟皆硷拷锟斤拷锟铰撅拷锟斤拷锟斤拷锟斤拷锟轿伙拷谩锟斤拷锟斤拷锟斤拷锟絎indows锟皆撅拷锟斤拷锟叫的达拷锟斤拷锟斤拷
- 锟斤拷锟斤拷锟斤拷锟叫撅拷锟斤拷锟叫伙拷锟斤拷锟铰硷拷
锟斤拷 - 锟斤拷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斤拷锟斤拷时锟斤拷锟结供一锟街★拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷烁
锟斤拷 - 锟斤拷使锟斤拷锟斤拷锟节撅拷锟斤拷锟斤拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟狡讹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酵撅拷锟斤拷锟斤拷讯息
锟斤拷
锟斤拷锟斤拷锟角筹拷式写锟斤拷锟斤拷应锟斤拷锟斤拷傻墓锟斤拷锟斤拷锟�
- 锟斤拷始锟斤拷锟斤拷锟斤拷锟叫的凤拷围锟斤拷位锟斤拷
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侥撅拷锟斤拷锟斤拷讯息
锟斤拷 - 锟斤拷锟铰撅拷锟斤拷锟斤拷锟节撅拷锟斤拷锟斤拷锟斤拷锟轿伙拷锟�
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曰锟接︼拷跃锟斤拷锟斤拷械母锟斤拷锟�
锟斤拷
锟斤拷锟斤拷锟斤拷锟叫的达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强锟揭恍╋拷锟绞斤拷锟绞憋拷锟叫╋拷锟斤拷缘酶锟斤拷锟斤拷锟斤拷锟斤拷濉�
锟斤拷锟斤拷锟斤拷讯息
锟斤拷
锟斤拷锟矫伙拷锟襟单伙拷锟斤拷锟斤拷锟叫伙拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷Windows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_VSCROLL锟斤拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷锟斤拷WM_HSCROLL锟斤拷锟斤拷锟斤拷锟斤拷锟狡讹拷锟斤拷讯息锟斤拷锟节撅拷锟斤拷锟斤拷锟较碉拷每锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟劫诧拷锟斤拷锟斤拷锟斤拷讯息锟斤拷一锟斤拷锟节帮拷锟铰伙拷锟斤拷钮时锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟酵放帮拷钮时锟斤拷锟斤拷锟斤拷
锟斤拷锟斤拷锟叫碉拷讯息一锟斤拷锟斤拷 WM_VSCROLL锟斤拷WM_HSCROLL也锟斤拷锟斤拷wParam锟斤拷lParam讯息锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷哟锟斤拷锟揭伙拷锟斤拷侄锟斤拷锟斤拷锟斤拷木锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷锟斤拷院锟斤拷锟絣Param锟斤拷锟斤拷只锟斤拷锟斤拷锟斤拷为锟斤拷锟接达拷锟斤拷锟斤拷锟斤拷锟侥撅拷锟斤拷锟叫ｏ拷通锟斤拷锟节对伙拷锟斤拷锟斤拷锟节ｏ拷锟斤拷
wParam讯息锟斤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揭伙拷锟斤拷锟斤拷锟斤拷椤Param锟侥碉拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷值锟斤拷锟斤拷指锟斤拷锟剿伙拷锟斤拷跃锟斤拷锟斤拷薪锟斤拷械牟锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷通知锟诫」锟斤拷通知锟斤拷锟街碉拷锟斤拷锟絊B锟斤拷锟斤拷锟斤拷锟斤拷scroll bar锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷锟斤拷头锟斤拷识锟斤拷锟街讹拷锟藉。锟斤拷锟斤拷锟斤拷锟斤拷WINUSER.H锟叫讹拷锟斤拷锟酵ㄖ拷耄�
#define SB_LINEUP 0 #define SB_LINELEFT 0 #define SB_LINEDOWN 1 #define SB_LINERIGHT 1 #define SB_PAGEUP 2 #define SB_PAGELEFT 2 #define SB_PAGEDOWN 3 #define SB_PAGERIGHT 3 #define SB_THUMBPOSITION 4 #define SB_THUMBTRACK 5 #define SB_TOP 6 #define SB_LEFT 6 #define SB_BOTTOM 7 #define SB_RIGHT 7 #define SB_ENDSCROLL 8
锟斤拷锟斤拷LEFT锟斤拷RIGHT锟斤拷识锟斤拷锟斤拷锟斤拷锟剿斤拷锟斤拷锟斤拷校锟斤拷锟斤拷锟経P锟斤拷DOWN锟斤拷TOP锟斤拷BOTTOM锟斤拷识锟斤拷锟斤拷锟斤拷於达拷直锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟节撅拷锟斤拷锟叫的诧拷同锟斤拷锟津单伙拷锟斤拷锟斤拷锟斤拷锟斤拷通知锟斤拷锟斤拷图4-7锟斤拷示锟斤拷
锟斤拷
| 图4-7 锟斤拷於撅拷锟斤拷锟斤拷讯息锟斤拷wParam值锟斤拷识锟斤拷锟斤拷 |
锟斤拷锟斤拷诰锟斤拷锟斤拷械母锟斤拷锟斤拷锟轿伙拷锟阶★拷锟斤拷锟斤拷锟斤拷锟斤拷式锟斤拷锟斤拷锟秸碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖断拷锟斤拷锟斤拷头呕锟斤拷锟斤拷锟结，锟斤拷式锟斤拷锟秸碉拷一锟斤拷锟斤拷锟斤拷SB_ENDSCROLL通知锟斤拷锟窖断拷锟揭伙拷锟斤拷锟皆猴拷锟斤拷锟斤拷锟窖断拷锟絎indows锟斤拷锟斤拷去锟侥憋拷锟斤拷锟斤拷锟斤拷锟斤拷位锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟节筹拷式锟叫猴拷锟斤拷SetScrollPos锟斤拷锟侥憋拷锟斤拷锟斤拷锟斤拷锟斤拷位锟矫★拷
锟斤拷锟窖伙拷锟斤拷锟斤拷伪锟斤拷锟节撅拷锟斤拷锟斤拷锟斤拷锟较诧拷锟斤拷住锟斤拷锟斤拷锟绞憋拷锟斤拷锟斤拷涂锟斤拷锟斤拷贫锟斤拷锟斤拷锟斤拷锟斤拷椤ｏ拷锟斤拷锟斤拷筒锟斤拷锟斤拷舜锟斤拷锟絊B_THUMBTRACK锟斤拷SB_THUMBPOSITION通知锟斤拷木锟斤拷锟斤拷锟窖断拷锟斤拷锟絯Param锟侥碉拷锟斤拷锟斤拷锟斤拷SB_THUMBTRACK时锟斤拷wParam锟侥革拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷目前位锟矫★拷锟斤拷位锟斤拷位於撅拷锟斤拷锟叫凤拷围锟斤拷锟斤拷小值锟斤拷锟斤拷锟街抵拷洹ｏ拷锟絯Param锟侥碉拷锟斤拷锟斤拷锟斤拷SB_THUMBPOSITION时锟斤拷wParam锟侥革拷锟斤拷锟斤拷锟斤拷使锟斤拷锟斤拷锟酵放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锟轿伙拷谩锟斤拷锟斤拷锟斤拷锟斤拷锟侥撅拷锟斤拷锟叫诧拷锟斤拷锟斤拷wParam锟侥革拷锟斤拷锟斤拷应锟矫憋拷锟斤拷锟皆★拷
为锟剿革拷使锟斤拷锟斤拷锟结供锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷锟矫伙拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟狡讹拷锟斤拷锟斤拷同时锟斤拷锟侥筹拷式锟斤拷锟秸碉拷SB_THUMBTRACK讯息锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷锟酵拷锟斤拷锟斤拷锟絊etScrollPos锟斤拷锟斤拷锟斤拷SB_THUMBTRACK锟斤拷SB_THUMBPOSITION讯息锟斤拷锟斤拷使锟斤拷锟斤拷锟酵放伙拷锟斤拷锟斤拷幔拷锟斤拷锟斤拷锟斤拷锟斤拷迅锟斤拷锟斤拷锟斤拷原锟斤拷锟斤拷位锟矫★拷
锟斤拷式锟杰癸拷锟斤拷锟斤拷SB_THUMBTRACK锟斤拷SB_THUMBPOSITION讯息锟斤拷锟斤拷一锟姐不同时锟斤拷锟斤拷锟斤拷锟竭★拷锟斤拷锟斤拷锟斤拷锟絊B_THUMBTRACK讯息锟斤拷锟斤拷使锟斤拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷要锟狡讹拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷荨锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷SB_THUMBPOSITION讯息锟斤拷锟斤拷只锟斤拷锟斤拷使锟斤拷锟斤拷停止锟较讹拷锟斤拷锟斤拷锟斤拷锟斤拷时锟狡讹拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷荨锟斤拷锟斤拷锟絊B_THUMBTRACK讯息锟斤拷锟斤拷一些锟斤拷锟斤拷锟斤拷锟斤拷锟窖ｏ拷锟斤拷锟斤拷锟侥承╋拷锟教拷锟斤拷锟斤拷希锟斤拷锟斤拷某锟绞斤拷锟斤拷芎锟斤拷迅锟斤拷喜锟斤拷锟斤拷锟窖断拷锟�
WINUSER.H锟斤拷头锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷SB_TOP锟斤拷SB_BOTTOM锟斤拷SB_LEFT锟斤拷SB_RIGHT通知锟诫，指锟斤拷锟斤拷锟斤拷锟斤拷锟窖撅拷锟斤拷锟狡碉拷锟斤拷锟斤拷锟斤拷锟斤拷小锟斤拷锟斤拷锟轿伙拷谩锟饺伙拷锟斤拷锟斤拷锟斤拷锟斤拷为应锟矫筹拷式锟接达拷一锟斤拷锟街讹拷锟斤拷锟斤拷锟侥撅拷锟斤拷锟斤拷锟斤拷说锟斤拷锟斤拷远锟斤拷锟斤拷锟斤拷盏锟斤拷锟叫┩ㄖ拷搿�
锟节撅拷锟斤拷锟叫凤拷围使锟斤拷32位元锟斤拷值也锟斤拷锟斤拷效锟侥ｏ拷锟斤拷锟斤拷锟解不锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷wParam锟侥革拷锟斤拷锟斤拷只锟斤拷16位元锟侥达拷小锟斤拷锟斤拷锟斤拷锟斤拷锟绞碉拷锟斤拷指锟斤拷SB_THUMBTRACK锟斤拷SB_THUMBPOSITION锟斤拷锟斤拷锟斤拷位锟矫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷拢锟斤拷锟揭癸拷锟紾etScrollInfo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矫碉拷锟斤拷讯锟斤拷
锟斤拷SYSMETS锟叫硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟�
锟斤拷
前锟斤拷锟剿碉拷锟斤拷丫锟斤拷锟斤拷昃★拷耍锟斤拷锟斤拷冢锟揭拷锟斤拷锟叫╋拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷恕锟斤拷锟斤拷锟斤拷强锟绞际憋拷锟叫╋拷锟斤拷哟锟街憋拷锟斤拷锟斤拷锟斤拷郑锟斤拷锟轿拷锟斤拷锟绞碉拷锟教拷锟揭拷锟街憋拷锟斤拷锟斤拷耍锟斤拷锟斤拷锟绞憋拷锟斤拷锟斤拷圆锟斤拷锟剿斤拷锟斤拷锟斤拷锟絊YSMET2锟斤拷锟绞�4-3锟斤拷示锟斤拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷蔷锟斤拷锟斤拷械锟斤拷锟津单碉拷应锟矫★拷
锟斤拷式4-3 SYSMETS2.C
/*------------------------------------------------------------------
SYSMETS2.C -- System Metrics Display Program No. 2
(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 ("SysMets2") ;
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 ("Get System Metrics No. 2"),
WS_OVERLAPPEDWINDOW | WS_VSCROLL,
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, cyClient, iVscrollPos ;
HDC hdc ;
int i, y ;
PAINTSTRUCT ps ;
TCHAR szBuffer[10] ;
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) ;
SetScrollRange (hwnd, SB_VERT, 0, NUMLINES - 1, FALSE) ;
SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;
return 0 ;
case WM_SIZE:
cyClient = HIWORD (lParam) ;
return 0 ;
case WM_VSCROLL:
switch (LOWORD (wParam))
{
case SB_LINEUP:
iVscrollPos -= 1 ;
break ;
case SB_LINEDOWN:
iVscrollPos += 1 ;
break ;
case SB_PAGEUP:
iVscrollPos -= cyClient / cyChar ;
break ;
case SB_PAGEDOWN:
iVscrollPos += cyClient / cyChar ;
break ;
case SB_THUMBPOSITION:
iVscrollPos = HIWORD (wParam) ;
break ;
default :
break ;
}
iVscrollPos = max (0, min (iVscrollPos, NUMLINES - 1)) ;
if (iVscrollPos != GetScrollPos (hwnd, SB_VERT))
{
SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;
InvalidateRect (hwnd, NULL, TRUE) ;
}
return 0 ;
case WM_PAINT:
hdc = BeginPaint (hwnd, &ps) ;
for (i = 0 ; i < NUMLINES ; i++)
{
y = cyChar * (i - iVscrollPos) ;
TextOut (hdc, 0, y,
sysmetrics[i].szLabel,
lstrlen (sysmetrics[i].szLabel)) ;
TextOut (hdc, 22 * cxCaps, y,
sysmetrics[i].szDesc,
lstrlen (sysmetrics[i].szDesc)) ;
SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;
TextOut (hdc, 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) ;
}
锟铰碉拷CreateWindow锟斤拷锟斤拷锟节碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫帮拷锟斤拷锟斤拷WS_VSCROLL锟接达拷锟斤拷式锟斤拷锟接讹拷锟斤拷锟接达拷锟叫硷拷锟斤拷锟剿达拷直锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟接达拷锟斤拷式为锟斤拷
WS_OVERLAPPEDWINDOW | WS_VSCROLL
WndProc锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟节达拷锟斤拷WM_CREATE讯息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斤拷锟斤拷锟矫达拷直锟斤拷锟斤拷锟叫的凤拷围锟酵筹拷始位锟矫ｏ拷
SetScrollRange (hwnd, SB_VERT, 0, NUMLINES - 1, FALSE) ; SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;
sysmetrics锟结构锟斤拷锟斤拷NUMLINES锟斤拷锟斤拷锟街ｏ拷锟斤拷锟皆撅拷锟斤拷锟叫凤拷围锟斤拷锟借定为0锟斤拷NUMLINES-1锟斤拷锟斤拷锟斤拷锟叫碉拷每锟斤拷位锟矫讹拷应锟斤拷锟斤拷锟斤拷示锟斤拷锟津顶诧拷锟斤拷示锟斤拷一锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟斤拷为0锟斤拷锟斤拷锟揭伙拷谢岜伙拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥讹拷锟斤拷锟斤拷锟斤拷锟轿伙拷么锟斤拷0锟斤拷锟斤拷锟斤拷锟叫就伙拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥讹拷锟斤拷锟斤拷锟斤拷位锟斤拷为NUMLINES-1时锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟街筹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�
为锟斤拷锟斤拷锟斤拷於达拷锟斤拷WM_VSCROLL讯息锟斤拷锟斤拷锟接达拷讯息锟斤拷锟斤拷锟斤拷式锟叫讹拷锟斤拷锟斤拷一锟斤拷锟斤拷态锟斤拷锟斤拷iVscrollPos锟斤拷锟斤拷一锟斤拷锟斤拷锟角撅拷锟斤拷锟斤拷锟节撅拷锟斤拷锟斤拷锟斤拷锟侥壳拔伙拷谩锟斤拷锟斤拷SB_LINEUP锟斤拷SB_LINEDOWN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锟揭伙拷锟斤拷锟轿伙拷锟轿伙拷谩锟斤拷锟斤拷SB_PAGEUP锟斤拷SB_PAGEDOWN锟斤拷锟斤拷锟斤拷锟斤拷锟狡讹拷一锟斤拷锟斤拷锟斤拷锟斤拷荩锟斤拷锟斤拷锟斤拷贫锟絚yClient /cyChar锟斤拷锟斤拷位锟斤拷位锟矫★拷锟斤拷锟絊B_THUMBPOSITION锟斤拷锟铰的撅拷锟斤拷锟斤拷锟斤拷位锟斤拷锟斤拷wParam锟侥革拷锟斤拷锟介。SB_ENDSCROLL锟斤拷SB_THUMBTRACK讯息锟斤拷锟斤拷锟皆★拷
锟节筹拷式锟斤拷锟斤拷锟秸碉拷锟斤拷WM_VSCROLL讯息锟斤拷锟斤拷锟斤拷碌锟絠VscrollPos值锟结，锟斤拷min锟斤拷max锟睫硷拷锟斤拷锟斤拷锟斤拷iVscrollPos锟斤拷锟斤拷确锟斤拷锟斤拷锟斤拷锟斤拷锟街碉拷锟斤拷锟叫≈抵拷洹ｏ拷锟绞饺伙拷峤玦VscrollPos锟斤拷锟斤拷锟紾etScrollPos取锟矫碉拷锟斤拷前位锟斤拷锟斤拷冉希锟斤拷锟斤拷锟斤拷锟斤拷位锟矫凤拷锟斤拷锟剿变化锟斤拷锟斤拷使锟斤拷SetScrollPos锟斤拷锟斤拷锟叫革拷锟铰ｏ拷锟斤拷锟揭猴拷锟斤拷InvalidateRect使锟斤拷锟斤拷锟接达拷锟斤拷效锟斤拷
InvalidateRect锟斤拷锟叫诧拷锟斤拷一锟斤拷WM_PAINT讯息锟斤拷SYSMETS1锟节达拷锟斤拷WM_PAINT讯息时锟斤拷每一锟叫碉拷y锟斤拷锟斤拷锟斤拷愎轿拷锟�
cyChar * i
锟斤拷SYSMETS2锟叫ｏ拷锟斤拷锟姐公式为锟斤拷
cyChar * (i - iVscrollPos)
锟斤拷圈锟斤拷然锟斤拷示NUMLINES锟斤拷锟斤拷锟街ｏ拷锟斤拷锟角讹拷於凤拷锟斤拷值锟斤拷iVscrollPos锟角革拷锟斤拷锟斤拷锟斤拷式实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示锟斤拷些锟斤拷锟斤拷锟叫★拷锟斤拷然锟斤拷Windows锟斤拷锟斤拷锟斤拷示锟斤拷些锟叫ｏ拷锟斤拷锟接┠伙拷缘锟角拷锟斤拷锟狡拷锟斤拷锟�
前锟斤拷说锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷始锟斤拷锟斤拷弄锟斤拷太锟斤拷锟接ｏ拷锟斤拷锟斤拷锟侥筹拷式锟斤拷锟斤拷朔眩锟叫э拷屎艿汀锟斤拷锟斤拷锟斤拷锟斤拷嵌源思锟斤拷锟斤拷薷模锟斤拷锟斤拷锟斤拷锟揭拷锟斤拷锟斤拷锟絎M_VSCROLL讯息之锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟侥凤拷锟斤拷锟斤拷
锟斤拷图锟斤拷式锟斤拷锟斤拷织
锟斤拷
锟节达拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖断拷幔琒YSMETS2锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷锟洁反锟斤拷锟斤拷锟斤拷锟斤拷InvalidateRect使锟斤拷示锟斤拷锟斤拷失效锟斤拷锟解导锟斤拷Windows锟斤拷一锟斤拷WM_PAINT讯息锟斤拷锟斤拷讯息锟斤拷锟斤拷锟叫★拷
锟斤拷锟斤拷锟绞筗indows锟斤拷式锟节伙拷应WM_PAINT讯息时锟斤拷锟斤拷锟斤拷械锟斤拷锟绞撅拷锟斤拷锟斤拷锟狡癸拷锟杰★拷锟斤拷为锟斤拷式锟斤拷锟斤拷锟斤拷一锟斤拷锟秸碉拷WM_PAINT讯息时锟酵革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诔锟绞斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭诧拷锟斤拷频幕锟斤拷锟斤拷锟斤拷芸锟斤拷锟绞癸拷锟绞斤拷锟斤拷馗锟斤拷锟�
锟斤拷锟饺ｏ拷锟斤拷锟斤拷锟杰讹拷锟斤拷锟街癸拷锟斤拷抹锟角的凤拷式锟叫碉拷锟结烦锟斤拷锟斤拷Windows锟斤拷锟斤拷锟节ｏ拷锟斤拷为锟斤拷锟街凤拷式锟斤拷锟斤拷锟斤拷模式锟侥筹拷式锟斤拷撇锟斤拷太锟襟，筹拷式写锟斤拷锟竭感碉拷锟斤拷锟街革拷锟斤拷锟斤拷锟斤拷锟斤拷狻ｏ拷锟斤拷遥锟斤拷锟绞揭拷锟斤拷系锟酵拷锟斤拷锟斤拷匣锟斤拷苹锟斤拷锟斤拷锟斤拷锟接︼拷锟斤拷毯突锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷确锟斤拷锟斤拷锟斤拷锟叫э拷锟斤拷锟斤拷锟斤拷诤芏锟斤拷锟斤拷锟铰ｏ拷锟斤拷锟斤拷全锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟节伙拷应WM_PAINT讯息时锟斤拷锟桔伙拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷全锟斤拷锟斤拷讯锟斤拷原锟斤拷之锟结，锟斤拷锟斤拷锟斤拷纸锟斤拷锟叫碉拷锟斤拷锟斤拷摹锟�
锟斤拷同SYSMETS2示锟斤拷锟侥ｏ拷锟斤拷式锟斤拷然锟斤拷要锟节达拷锟斤拷锟斤拷WM_PAINT讯息时锟斤拷锟斤拷锟截讹拷锟斤拷锟斤拷示锟斤拷锟斤拷使锟斤拷InvalidateRect锟酵很凤拷锟姐，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟斤拷示锟斤拷锟斤拷锟节碉拷锟截讹拷锟斤拷锟轿伙拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷失效锟斤拷
只锟斤拷锟接达拷锟斤拷示锟斤拷锟斤拷锟斤拷为锟斤拷效锟皆诧拷锟斤拷WM_PAINT讯息锟斤拷锟斤拷锟侥承┯︼拷贸锟绞斤拷锟剿狄诧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选锟斤拷锟节猴拷锟斤拷InvalidateRect之锟结，Windows锟斤拷WM_PAINT讯息锟斤拷锟斤拷讯息锟斤拷锟斤拷锟叫ｏ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锟斤拷然锟斤拷锟斤拷Windows锟斤拷WM_PAINT讯息锟斤拷锟缴碉拷锟斤拷锟斤拷顺锟斤拷讯息锟斤拷锟斤拷锟较低筹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷亩锟斤拷锟斤拷锟斤拷诜锟斤拷锟斤拷锟斤拷锟矫匆诧拷锟斤拷锟斤拷锟斤拷锟斤拷却锟揭伙拷锟斤拷锟斤拷锟斤拷锟斤拷时锟斤拷锟斤拷锟皆伙拷锟斤拷锟斤拷锟斤拷失时锟斤拷锟斤拷锟斤拷锟斤拷锟揭恍╋拷瞻椎摹锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟饺伙拷却锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟斤拷锟�
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叫э拷锟斤拷颍锟斤拷锟斤拷诤锟斤拷锟絀nvalidateRect之锟斤拷锟斤拷锟経pdateWindow锟斤拷
UpdateWindow (hwnd) ;
锟斤拷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效锟斤拷锟斤拷UpdateWindow锟斤拷锟斤拷锟斤拷Windows锟斤拷WM_PAINT讯息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绞撅拷锟斤拷锟斤拷锟叫э拷锟斤拷虿缓锟斤拷锟斤拷哟锟窖断拷锟斤拷锟斤拷锟绞斤拷锟斤拷锟斤拷锟揭籛M_PAINT讯息锟斤拷锟斤拷锟斤拷讯息锟斤拷锟叫ｏ拷直锟斤拷锟斤拷Windows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接达拷讯息锟斤拷锟斤拷锟斤拷式锟斤拷筛锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷顺锟斤拷锟絎indows锟斤拷锟斤拷锟狡达拷锟截革拷锟斤拷式锟斤拷UpdateWindow锟斤拷锟斤拷之锟斤拷锟斤拷锟斤拷锟斤拷锟�
锟斤拷锟斤拷锟斤拷注锟解到锟斤拷UpdateWindow锟斤拷WinMain锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷WM_PAINT讯息锟侥猴拷式锟斤拷同锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷哟锟绞憋拷锟斤拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷荼锟轿拷锟叫э拷锟経pdateWindow指示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示锟斤拷锟斤拷
锟斤拷锟斤拷锟斤拷锟矫的癸拷锟斤拷
锟斤拷
SYSMETS2锟斤拷锟斤拷锟斤拷锟矫ｏ拷锟斤拷锟斤拷只锟斤拷模锟斤拷锟斤拷锟斤拷锟斤拷式锟叫的撅拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷效锟绞很低★拷锟杰匡拷锟揭斤拷示锟斤拷一锟斤拷锟铰的版本锟斤拷锟侥斤拷锟斤拷锟侥诧拷锟姐。也锟斤拷锟斤拷锟斤拷趣锟斤拷锟斤拷锟斤拷锟斤拷掳姹撅拷锟绞癸拷锟侥壳帮拷锟斤拷锟斤拷鄣锟斤拷母锟斤拷锟斤拷锟斤拷泻锟绞斤拷锟斤拷喾达拷锟斤拷锟斤拷锟绞癸拷锟絎in32 API锟叫诧拷锟叫碉拷锟铰猴拷式锟斤拷
锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷式
锟斤拷
锟斤拷锟斤拷锟斤拷锟侥硷拷锟斤拷锟斤拷/Platform SDK/User Interface Services/Controls/Scroll Bars锟叫ｏ拷指锟斤拷SetScrollRange锟斤拷SetScrollPos锟斤拷GetScrollRange锟斤拷GetScrollPos锟斤拷式锟角★拷锟斤拷时锟侥★拷锟斤拷锟斤拷锟解并锟斤拷锟斤拷全锟斤拷确锟斤拷锟斤拷些锟斤拷式锟斤拷Windows 1.0锟叫就筹拷锟斤拷锟剿ｏ拷锟斤拷Win32 API锟斤拷锟斤拷锟斤拷锟皆达拷锟斤拷32位元锟斤拷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锟矫的癸拷锟杰★拷锟斤拷锟揭ｏ拷锟斤拷锟角诧拷锟斤拷Windows锟斤拷式锟斤拷锟斤拷锟斤拷潞锟绞斤拷锟斤拷突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绞癸拷锟斤拷锟斤拷堑锟皆拷锟�
Win32 API锟斤拷锟杰碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫猴拷式锟斤拷锟斤拷SetScrollInfo锟斤拷GetScrollInfo锟斤拷锟斤拷些锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟角帮拷锟绞斤拷锟饺拷锟斤拷锟斤拷埽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浴锟�
锟斤拷一锟斤拷锟斤拷锟斤拷锟芥及锟斤拷锟斤拷锟斤拷锟斤拷拇锟叫★拷锟斤拷锟斤拷锟斤拷锟阶拷獾斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷小锟斤拷SYSMETS2锟斤拷式锟斤拷锟角固讹拷锟侥★拷然锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷使锟矫碉拷锟斤拷一些Windows应锟矫筹拷式锟叫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫★拷锟斤拷锟斤拷哟锟斤拷锟斤拷锟绞撅拷锟斤拷募锟斤拷锟叫★拷杀锟斤拷锟斤拷锟斤拷锟绞撅拷拇锟叫★拷锟斤拷锟斤拷锟揭筹拷锟斤拷小锟斤拷锟斤拷锟斤拷锟姐法为锟斤拷
锟斤拷
锟斤拷锟斤拷使锟斤拷SetScrollInfo锟斤拷锟斤拷锟斤拷页锟斤拷锟叫★拷锟斤拷佣锟斤拷锟斤拷锟斤拷司锟斤拷锟斤拷锟斤拷锟侥达拷小锟斤拷锟斤拷锟界将要锟斤拷锟斤拷锟斤拷SYSMETS3锟斤拷式锟斤拷示锟斤拷
GetScrollInfo锟斤拷式锟斤拷锟斤拷锟剿第讹拷锟斤拷锟斤拷要锟侥癸拷锟杰ｏ拷锟斤拷锟斤拷说锟斤拷锟侥斤拷锟斤拷目前API锟侥诧拷锟姐。锟斤拷锟斤拷锟斤拷要使锟斤拷65,536锟斤拷锟斤拷锟轿伙拷姆锟轿э拷锟斤拷锟斤拷锟�16位元Windows锟斤拷锟角诧拷锟斤拷锟杰的★拷锟斤拷然锟斤拷Win32锟叫ｏ拷锟斤拷式锟斤拷锟斤拷锟斤拷为锟缴斤拷锟斤拷32位元锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟矫伙拷锟斤拷锟斤拷锟侥★拷锟斤拷锟斤拷住锟斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟侥凤拷围锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟绞碉拷锟斤拷锟斤拷锟轿伙拷锟斤拷锟斤拷锟饺伙拷删锟斤拷锟斤拷械锟酵硷拷卮锟叫★拷锟斤拷疲锟斤拷锟饺伙拷锟斤拷锟斤拷锟绞癸拷锟絊B_THUMBTRACK锟斤拷SB_THUMBPOSITION通知锟斤拷玫锟絎M_VSCROLL锟斤拷WM_HSCROLL讯息时锟斤拷只锟结供锟斤拷16位元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侥壳拔伙拷谩锟酵拷锟紾etScrollInfo锟斤拷式锟斤拷锟斤拷取锟斤拷锟斤拷实锟斤拷32位元值锟斤拷
SetScrollInfo锟斤拷GetScrollInfo锟斤拷式锟斤拷锟斤法锟斤拷
SetScrollInfo (hwnd, iBar, &si, bRedraw) ; GetScrollInfo (hwnd, iBar, &si) ;
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫猴拷式锟斤拷锟斤拷锟斤拷锟斤拷iBar锟斤拷锟斤拷锟斤拷SB_VERT锟斤拷SB_HORZ锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷於撅拷锟斤拷锟叫匡拷锟狡碉拷SB_CTL锟斤拷SetScrollInfo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TRUE锟斤拷FALSE锟斤拷指锟斤拷锟斤拷锟角凤拷要Windows锟斤拷锟铰伙拷锟狡硷拷锟斤拷锟斤拷锟斤拷锟斤拷讯锟斤拷木锟斤拷锟斤拷小锟�
锟斤拷锟斤拷锟斤拷式锟侥碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷SCROLLINFO锟结构锟斤拷锟斤拷锟斤拷为锟斤拷
typedef struct tagSCROLLINFO
{
UINT cbSize ; // set to sizeof (SCROLLINFO)
UINT fMask ; // values to set or get
int nMin ; // minimum range value
int nMax ; // maximum range value
UINT nPage ; // page size
int nPos ; // current position
int nTrackPos ;// current tracking position
}
SCROLLINFO, * PSCROLLINFO ;
锟节筹拷式锟叫ｏ拷锟斤拷锟皆讹拷锟斤拷锟斤拷锟铰碉拷SCROLLINFO锟结构锟斤拷态锟斤拷
SCROLLINFO si ;
锟节猴拷锟斤拷SetScrollInfo锟斤拷GetScrollInfo之前锟斤拷锟斤拷锟诫将cbSize锟斤拷位锟借定为锟结构锟侥达拷小锟斤拷
si.cbSize = sizeof (si) ;
锟斤拷
si.cbSize = sizeof (SCROLLINFO) ;
锟斤拷锟斤拷悉Windows锟结，锟斤拷锟酵会发锟斤拷锟斤拷锟解几锟斤拷锟结构锟斤拷锟斤拷锟斤拷峁挂伙拷锟斤拷锟斤拷锟揭伙拷锟斤拷锟轿恢革拷锟斤拷私峁癸拷锟叫★拷锟斤拷锟斤拷锟斤拷位使锟斤拷锟斤拷锟斤拷Windows锟芥本锟斤拷锟斤拷锟斤拷锟斤拷峁癸拷锟斤拷锟斤拷锟斤拷碌墓锟斤拷埽锟斤拷锟斤拷锟斤拷锟饺伙拷锟斤拷锟角帮拷锟斤拷锟侥版本锟斤拷锟捷★拷
锟斤拷fMask锟斤拷位锟借定为一锟斤拷锟斤拷锟斤拷锟斤拷SIF锟斤拷锟阶匡拷头锟斤拷锟斤拷辏拷锟斤拷铱锟斤拷锟绞癸拷锟紺锟斤拷位元锟斤拷锟斤拷OR锟斤拷锟斤拷锟斤拷(|)锟斤拷锟斤拷锟叫╋拷锟疥。
SetScrollInfo锟斤拷式使锟斤拷SIF_RANGE锟斤拷锟绞憋拷锟斤拷锟斤拷锟斤拷nMin锟斤拷nMax锟斤拷位锟借定为锟斤拷锟斤拷木锟斤拷锟斤拷蟹锟轿э拷锟紾etScrollInfo锟斤拷式使锟斤拷SIF_RANGE锟斤拷锟绞憋拷锟接︼拷锟絥Min锟斤拷nMax锟斤拷位锟借定为锟接猴拷式锟斤拷锟截碉拷目前锟斤拷围锟斤拷
SIF_POS锟斤拷锟揭惨伙拷锟斤拷锟斤拷锟酵拷锟絊etScrollInfo使锟斤拷锟斤拷时锟斤拷锟斤拷锟斤拷呀峁癸拷锟絥Pos锟斤拷位锟借定为锟斤拷锟斤拷锟轿伙拷谩锟斤拷锟斤拷锟酵拷锟紾etScrollInfo使锟斤拷SIF_POS锟斤拷锟斤拷锟饺★拷锟侥壳拔伙拷谩锟�
使锟斤拷SIF_PAGE锟斤拷锟斤拷芄锟饺★拷锟揭筹拷锟斤拷小锟斤拷锟斤拷SetScrollInfo锟斤拷式锟斤拷nPage锟借定为锟斤拷锟斤拷锟揭筹拷锟斤拷小锟斤拷GetScrollInfo使锟斤拷SIF_PAGE锟斤拷锟斤拷锟斤拷取锟斤拷目前页锟斤拷拇锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷玫锟斤拷锟斤拷锟斤拷锟斤拷木锟斤拷锟斤拷校锟斤拷筒锟揭癸拷酶锟斤拷锟疥。
锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷SB_THUMBTRACK锟斤拷SB_THUMBPOSITION通知锟斤拷锟絎M_VSCROLL锟斤拷WM_HSCROLL讯息时锟斤拷通锟斤拷GetScrollInfo只使锟斤拷SIF_TRACKPOS锟斤拷辍ｏ拷雍锟绞斤拷拇锟斤拷锟斤拷校锟絊CROLLINFO锟结构锟斤拷nTrackPos锟斤拷位锟斤拷指锟斤拷目前锟斤拷32位元锟侥撅拷锟斤拷锟斤拷锟斤拷位锟矫★拷
锟斤拷SetScrollInfo锟斤拷式锟叫斤拷使锟斤拷SIF_DISABLENOSCROLL锟斤拷辍ｏ拷锟斤拷指锟斤拷锟剿达拷锟斤拷辏拷锟斤拷锟斤拷碌木锟斤拷锟斤拷胁锟斤拷锟绞癸拷锟斤拷锟斤拷锟斤拷锟绞э拷锟斤拷锟矫撅拷锟斤拷锟叫就诧拷锟斤拷使锟斤拷锟剿ｏ拷锟斤拷锟斤拷锟斤拷懈锟斤拷锟侥斤拷锟酵ｏ拷锟斤拷
SIF_ALL锟斤拷锟斤拷锟絊IF_RANGE锟斤拷SIF_POS锟斤拷SIF_PAGE锟斤拷SIF_TRACKPOS锟斤拷锟斤拷稀锟斤拷锟絎M_SIZE讯息锟斤拷锟斤拷锟节硷拷锟斤拷锟矫撅拷锟斤拷锟叫诧拷锟斤拷时锟斤拷锟斤拷锟角很凤拷锟斤拷模锟斤拷锟絊etScrollInfo锟斤拷式锟斤拷指锟斤拷SIF_TRACKPOS锟结，锟斤拷锟结被锟斤拷锟皆ｏ拷锟斤拷锟斤拷锟节达拷锟斤拷锟斤拷锟斤拷锟斤拷讯息时也锟角很凤拷锟斤拷摹锟�
锟斤拷锟斤拷锟斤拷围
锟斤拷
锟斤拷SYSMETS2锟叫ｏ拷锟斤拷锟斤拷锟斤拷围锟斤拷锟斤拷锟斤拷小为0锟斤拷锟斤拷锟轿狽UMLINES-1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟斤拷锟斤拷0时锟斤拷锟斤拷一锟斤拷锟斤拷讯锟斤拷示锟斤拷锟斤拷示锟斤拷锟斤拷亩锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷械锟轿伙拷锟斤拷锟絅UMLINES-1时锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷示锟斤拷锟斤拷示锟斤拷锟斤拷亩锟斤拷锟斤拷锟斤拷锟斤拷铱锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷小锟�
锟斤拷锟斤拷说SYSMETS2锟斤拷锟斤拷锟斤拷围太锟斤拷锟斤拷实锟斤拷只锟斤拷锟斤拷锟窖讹拷锟斤拷锟揭伙拷锟斤拷锟绞撅拷锟斤拷锟绞撅拷锟斤拷锟侥底诧拷锟斤拷锟斤拷锟角讹拷锟斤拷锟斤拷锟缴★拷锟斤拷锟角匡拷锟皆讹拷SYSMETS2锟斤拷锟斤拷一些锟睫革拷锟皆达到锟剿点。锟斤拷锟斤拷锟斤拷WM_CREATE讯息时锟斤拷锟斤拷锟矫撅拷锟斤拷锟叫凤拷围锟斤拷锟斤拷锟角等碉拷锟斤拷锟秸碉拷WM_SIZE讯息锟斤拷锟斤拷锟斤拷锟剿癸拷锟斤拷锟斤拷
iVscrollMax = max (0, NUMLINES - cyClient / cyChar) ; SetScrollRange (hwnd, SB_VERT, 0, iVscrollMax, TRUE) ;
锟劫讹拷NUMLINES锟斤拷锟�75锟斤拷锟斤拷锟劫讹拷锟截讹拷锟接达拷锟斤拷小锟角ｏ拷50锟斤拷cyChar锟斤拷锟斤拷cyClient锟斤拷锟斤拷锟斤拷锟戒话说锟斤拷锟斤拷锟斤拷锟斤拷75锟斤拷锟斤拷讯锟斤拷只锟斤拷50锟叫匡拷锟斤拷锟斤拷示锟斤拷锟斤拷示锟斤拷锟斤拷锟叫★拷使锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谐锟绞斤拷耄拷逊锟轿э拷锟斤拷锟斤拷锟叫∥�0锟斤拷锟斤拷锟轿�25锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷位锟矫碉拷锟�0时锟斤拷锟斤拷式锟斤拷示0锟斤拷49锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷位锟矫碉拷锟�1时锟斤拷锟斤拷式锟斤拷示1锟斤拷50锟叫ｏ拷锟斤拷锟揭碉拷锟斤拷锟斤拷锟斤拷位锟矫碉拷锟�25锟斤拷锟斤拷锟街碉拷锟绞憋拷锟斤拷锟绞斤拷锟绞�25锟斤拷74锟叫★拷锟斤拷锟斤拷锟斤拷锟斤拷要锟皆筹拷式锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟睫改ｏ拷锟斤拷锟斤拷锟角匡拷锟叫的★拷
锟铰撅拷锟斤拷锟叫猴拷式锟斤拷一锟斤拷锟矫的癸拷锟斤拷锟角碉拷使锟斤拷锟斤拷锟斤拷锟斤拷蟹锟轿б伙拷锟斤拷锟斤拷页锟斤拷时锟斤拷锟斤拷锟窖撅拷为锟斤拷锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷隆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟侥筹拷式锟斤拷一锟斤拷使锟斤拷SCROLLINFO锟结构锟斤拷SetScrollInfo锟斤拷
si.cbSize = sizeof (SCROLLINFO) ; si.cbMask = SIF_RANGE | SIF_PAGE ; si.nMin = 0 ; si.nMax = NUMLINES - 1 ; si.nPage = cyClient / cyChar ; SetScrollInfo (hwnd, SB_VERT, &si, TRUE) ;
锟斤拷锟斤拷锟斤拷之锟结，Windows锟斤拷锟斤拷锟斤拷木锟斤拷锟斤拷锟轿伙拷锟斤拷锟斤拷锟轿猻i.nMax - si.nPage +1锟斤拷锟斤拷锟斤拷si.nMax锟斤拷锟斤拷前锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟借：NUMLINES锟斤拷锟�75 锟斤拷锟斤拷锟斤拷si.nMax锟斤拷锟�74锟斤拷锟斤拷si.nPage锟斤拷锟�50锟斤拷锟斤拷锟斤拷味锟斤拷锟斤拷锟侥撅拷锟斤拷锟斤拷位锟斤拷锟斤拷锟斤拷为74 - 50 + 1锟斤拷锟斤拷25锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷要锟侥★拷
锟斤拷页锟斤拷锟叫★拷锟斤拷锟斤拷锟叫凤拷围一锟斤拷锟斤拷时锟斤拷锟结发锟斤拷什么锟斤拷锟斤拷兀锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟斤拷nPage锟斤拷锟�75锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絎indows通锟斤拷锟斤拷锟截撅拷锟斤拷锟叫ｏ拷锟斤拷为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锟斤拷锟斤拷鼐锟斤拷锟斤拷校锟斤拷锟斤拷诤锟斤拷锟絊etScrollInfo时使锟斤拷SIF_DISABLENOSCROLL锟斤拷Windows只锟斤拷锟斤拷锟角革拷锟斤拷锟斤拷锟叫诧拷锟杰憋拷使锟矫ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷
锟斤拷SYSMETS
锟斤拷
SYSMETS3锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟絊YSMETS锟斤拷式锟芥本锟斤拷锟斤拷示锟节筹拷式4-4锟叫★拷锟剿版本使锟斤拷SetScrollInfo锟斤拷GetScrollInfo锟斤拷式锟斤拷锟斤拷锟斤拷锟斤拷锟揭撅拷锟斤拷锟斤拷水平锟斤拷锟斤拷锟叫ｏ拷锟斤拷锟杰革拷锟斤拷效锟斤拷锟截伙拷锟斤拷示锟斤拷锟斤拷
锟斤拷式4-4 SYSMETS3
SYSMETS3.C
/*------------------------------------------------------------------
SYSMETS3.C -- System Metrics Display Program No. 3
(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 ("SysMets3") ;
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 No. 3"),
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 ;
HDC hdc ;
int i, x, y, iVertPos, iHorzPos, iPaintBeg, iPaintEnd ;
PAINTSTRUCT ps ;
SCROLLINFO si ;
TCHAR szBuffer[10] ;
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) ;
// Save the width of the three columns
iMaxWidth = 40 * cxChar + 22 * cxCaps ;
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_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) ;
}
锟斤拷锟斤拷姹撅拷某锟绞斤拷锟斤拷锟絎indows锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟窖讹拷锟斤拷锟斤拷呓锟斤拷椤ｏ拷锟絎M_VSCROLL锟斤拷WM_HSCROLL锟斤拷锟斤拷锟侥匡拷始锟斤拷锟斤拷取锟斤拷锟斤拷锟叫的撅拷锟斤拷锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷通知锟斤拷锟斤拷锟轿伙拷茫锟饺伙拷锟斤拷锟斤拷SetScrollInfo锟斤拷锟斤拷锟斤拷位锟矫★拷锟斤拷式然锟斤拷锟斤拷锟紾etScrollInfo锟斤拷锟斤拷锟斤拷锟轿伙拷贸锟斤拷锟斤拷锟絊etScrollInfo锟斤拷锟叫的凤拷围锟斤拷锟斤拷锟斤拷Windows锟斤拷锟斤拷锟斤拷锟斤拷位锟矫诧拷锟斤拷锟斤拷GetScrollInfo锟斤拷锟斤拷锟叫达拷锟斤拷锟斤拷确锟斤拷值锟斤拷
SYSMETS3使锟斤拷ScrollWindow锟斤拷式锟斤拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟叫撅拷锟斤拷锟斤拷讯锟斤拷锟斤拷锟斤拷锟截伙拷锟斤拷锟斤拷锟斤拷然锟矫猴拷式锟杰革拷锟接ｏ拷锟斤拷锟铰版本锟斤拷Windows锟斤拷锟窖憋拷锟斤拷锟斤拷锟接碉拷ScrollWindowEx锟斤拷锟斤拷锟斤拷锟斤拷锟絊YSMETS3锟斤拷锟斤拷锟洁当锟津单的凤拷式使锟斤拷锟斤拷锟斤拷锟斤拷式锟侥第讹拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷水平锟斤拷锟斤拷锟斤拷示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谴锟街憋拷锟斤拷锟斤拷锟绞撅拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷位锟斤拷锟斤拷图锟截★拷
ScrollWindow锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟借定为NULL锟斤拷锟斤拷指锟斤拷锟斤拷要锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷示锟斤拷锟斤拷Windows锟皆讹拷锟斤拷锟斤拷示锟斤拷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锟角的撅拷锟斤拷锟斤拷为锟斤拷效锟斤拷锟斤拷锟斤拷锟斤拷WM_PAINT讯息锟斤拷锟斤拷也锟斤拷锟斤拷要InvalidateRect锟剿★拷注锟斤拷ScrollWindow锟斤拷锟斤拷GDI锟斤拷式锟斤拷锟斤拷为锟斤拷锟斤拷锟斤拷装锟斤拷锟斤拷锟捷达拷锟脚★拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷GDI锟斤拷Windows锟斤拷式之一锟斤拷锟斤拷锟斤拷锟皆改憋拷锟接达拷锟斤拷锟斤拷示锟斤拷锟斤拷锟斤拷邸锟斤拷锟斤拷锟斤拷獾拷锟斤拷锟斤拷悖拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫猴拷式一锟斤拷锟斤拷锟斤拷锟斤拷募锟斤拷小锟�
WM_HSCROLL锟斤拷锟斤拷锟斤拷锟斤拷SB_THUMBPOSITION通知锟诫并锟斤拷锟斤拷SB_THUMBTRACK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水平锟斤拷锟斤拷锟斤拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟介，锟斤拷使锟斤拷锟斤拷锟酵放伙拷锟斤拷钮之前锟斤拷锟斤拷式锟斤拷锟斤拷水平锟斤拷锟斤拷锟接达拷锟斤拷锟斤拷锟捷★拷
WM_VSCROLL锟侥凤拷锟斤拷锟斤拷之锟斤拷同锟斤拷锟斤拷式锟斤拷锟斤拷SB_THUMBTRACK讯息锟斤拷锟斤拷锟斤拷SB_THUMBPOSITION锟斤拷锟斤拷锟斤拷锟斤拷锟绞斤拷锟绞癸拷锟斤拷锟斤拷诖锟街憋拷锟斤拷锟斤拷锟斤拷锟斤拷隙锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷直锟截癸拷锟斤拷锟斤拷锟捷★拷锟斤拷锟斤拷锟诫法锟杰好ｏ拷锟斤拷应注锟解：一锟斤拷使锟斤拷锟竭凤拷锟街筹拷式锟斤拷锟斤拷锟斤拷锟斤拷应锟较讹拷锟侥撅拷锟斤拷锟斤拷锟介，锟斤拷锟角就会不锟较碉拷锟斤拷锟斤拷锟较讹拷锟斤拷锟斤拷锟斤拷锟介。锟斤拷锟剿碉拷锟斤拷锟斤拷锟节碉拷PC锟斤拷每锟斤拷锟绞わ拷锟斤拷锟斤拷锟斤拷峡锟侥诧拷锟皆★拷锟斤拷锟斤拷锟节斤拷锟斤拷锟侥伙拷锟斤拷锟较ｏ拷锟斤拷锟皆匡拷锟斤拷为GetSystemMetrics使锟斤拷SB_SLOWMACHINE锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷执锟斤拷锟斤拷锟�
锟接匡拷WM_PAINT锟斤拷锟斤拷锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷SYSMETS3展示锟斤拷WM_PAINT锟斤拷锟斤拷锟斤拷式确锟斤拷锟斤拷效锟斤拷锟斤拷锟叫碉拷锟斤拷锟斤拷锟叫诧拷锟斤拷锟斤拷锟截伙拷锟斤拷些锟叫★拷锟斤拷然锟斤拷锟斤拷式锟诫复锟斤拷一些锟斤拷锟斤拷锟劫度很快。
锟斤拷锟矫伙拷锟斤拷锟斤拷么锟斤拷
锟斤拷
锟斤拷Windows锟斤拷锟斤拷锟节ｏ拷锟叫达拷锟斤拷锟斤拷使锟斤拷锟竭诧拷喜锟斤拷使锟矫伙拷锟襟，讹拷锟揭ｏ拷Windows锟斤拷锟斤拷也锟斤拷要锟斤拷锟斤拷锟斤拷谢锟斤拷锟斤拷锟饺伙拷锟矫伙拷谢锟斤拷锟斤拷PC锟斤拷锟斤拷锟斤拷锟斤拷锟剿碉拷色锟斤拷示锟斤拷锟酵碉拷锟斤拷印锟斤拷锟斤拷锟斤拷没锟斤拷之路锟斤拷锟斤拷锟斤拷锟斤拷然锟斤拷锟斤拷锟斤拷锟斤拷写锟斤拷锟斤拷使锟矫硷拷锟斤拷锟斤拷锟斤拷锟斤拷锟诫滑锟斤拷锟斤拷锟斤拷锟酵э拷锟斤拷某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锟斤拷锟斤拷锟侥伙拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟剿★拷锟斤拷为锟斤拷锟角的硷拷锟斤拷锟斤拷一锟斤拷锟轿憋拷锟狡讹拷锟斤拷锟斤拷锟斤拷锟斤拷应锟斤拷实锟斤拷同锟斤拷锟侥诧拷锟斤拷锟斤拷
锟斤拷锟斤拷一锟铰ｏ拷锟斤拷锟斤拷学习使锟矫硷拷锟教猴拷锟斤拷SYSMETS3锟斤拷锟斤拷锟接硷拷锟教斤拷锟斤拷姆锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷芑锟阶拷獾斤拷锟絊YSMETS3锟狡猴拷锟斤拷通知锟斤拷锟斤拷SB_TOP锟斤拷SB_BOTTOM时锟斤拷锟斤拷锟斤拷WM_VSCROLL讯息锟斤拷前锟斤拷锟窖撅拷锟结到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接撅拷锟斤拷锟叫斤拷锟斤拷锟斤拷些讯息锟斤拷锟斤拷锟皆ｏ拷目前锟斤拷锟角讹拷锟斤拷某锟绞斤拷搿ｏ拷锟斤拷锟斤拷锟斤拷锟斤拷锟揭伙拷锟斤拷俅位氐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斤拷锟斤拷原锟斤拷