透明的对话框 void TransparentBlt( HDC hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, HBITMAP hBitmap, int nXSrc, int nYSrc, COLORREF colorTransparent, HPALETTE hPal ) { CDC dc, memDC, maskDC, tempDC; dc.Attach( hdcDest ); maskDC.CreateCompatibleDC(&dc); CBitmap maskBitmap; //add t