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已知窗体的句柄,怎样把这个窗体的画面抓取下来?

如题~~
[4 byte] By [fireskys] at [2008-5-22]
«« 问有经验的朋友: MODEM通过COM口群发短信时,如果有人猛往回打电话,会导致大量短信发送失败,怎么处理?
»» HttpURLConnection问题(solaris 5.8+jdk1.4.2)
# 1
已知窗體的句柄為hwnd

GetWindowRect(hwnd, rRect)
lWidth = rRect.right - rrect.left
lHeight=rrect.botton - rrect.top
hdcScreen=GetDC(0)
Bitblt(ddc, 0, 0, lheight, lwidth, hdcscreen, rrect.left, rrect.top, lwidth, lheight, vbsrccopy)
releasedc(0, hdcscreen)

'其中 ddc為存儲抓出的圖片的目標DC，例如你用另一個picture控件保存，則為
Bitblt(picture.hdc, 0, 0, lheight, lwidth, hdcscreen, rrect.left, rrect.top, lwidth, lheight, vbsrccopy)
huwei001982-凶猛的小狗 at 2007-10-22 > top of Msdn China Tech,visual basic,多媒体...
# 2
看这个窗体是否是DIRECTX的话要另类处理
XmagicX-一瞬已成永恒codeday.com at 2007-10-22 > top of Msdn China Tech,visual basic,多媒体...
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