||initinstance||
hdc=GetDC(hWnd);
mdc=CreateCompatibleDC(hdc);//创建一个内存dc
bg=(HBITMAP)LoadImage(NULL,"bg.bmp",IMAGE_BITMAP,600,450,LR_LOADFROMFILE);//加载背景图
dra=(HBITMAP)LoadImage(NULL,"dra.bmp",IMAGE_BITMAP,170,99,LR_LOADFROMFILE);//加载要去掉多余部分的位图
MyPaint(hdc);
ReleaseDC(hWnd,hdc);
||MyPaint||
SelectObject(mdc ,bg);
BitBlt(hdc,0,0,600,450,mdc,0,0,SRCCOPY);//贴上背景图
SelectObject(mdc,dra);
BitBlt(hdc,280,320,85,99,mdc,85,0,SRCAND);//用背景图与前景图做和运算
BitBlt(hdc,280,320,85,99,mdc,0,0,SRCPAINT);//用背景图与屏蔽图做或运算
要点讲解,加载背景图,前景图,屏蔽图,先用屏蔽图与背景图做与运算,在用前景图与屏蔽图做或运算。