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S.F. 2004-10-27
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getDC(0);就是桌面了
beyondtkl 2004-10-26
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同意1楼。。
HDC GetDC(
HWND hWnd // handle to a window
);
Parameters
hWnd
Handle to the window whose device context is to be retrieved. If this value is NULL, GetDC retrieves the device context for the entire screen.
HDC GetDC(
HWND hWnd // handle to a window
);
Parameters
hWnd
Handle to the window whose device context is to be retrieved. If this value is NULL, GetDC retrieves the device context for the entire screen.
todouwang 2004-10-26
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canvas要realease要不就可能有内存泄漏，我刚从书上看的。
rjy206 2004-10-26
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up
fei19790920 2004-10-26
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var
aCanvas:TCanvas;
begin
aCanvas:=TCanvas.Create;
try
aCanvas.Handle:=GetDC(0);
{
//在此你就可以随便画了
aCanvas.lineto(500,500);
}
finally
aCanvas.Free;
end;
end;
aCanvas:TCanvas;
begin
aCanvas:=TCanvas.Create;
try
aCanvas.Handle:=GetDC(0);
{
//在此你就可以随便画了
aCanvas.lineto(500,500);
}
finally
aCanvas.Free;
end;
end;
