void DrawBMP(HDC hDC, int nWidth,int nHeight)
{
HDC hdcMem = ::CreateCompatibleDC( hDC );
HBITMAP hbmpMem = ::CreateCompatibleBitmap( hDC, nWidth, nHeight );//这里默认的是黑色的,想弄成透明的,请问如何解决???
HGDIOBJ hobjOld = ::SelectObject( hdcMem, hbmpMem );
.....
.....
.....
}
{
HDC hdcMem = ::CreateCompatibleDC( hDC );
HBITMAP hbmpMem = ::CreateCompatibleBitmap( hDC, nWidth, nHeight );//这里默认的是黑色的,想弄成透明的,请问如何解决???
HGDIOBJ hobjOld = ::SelectObject( hdcMem, hbmpMem );
.....
.....
.....
}
解决方案 »
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