cbitmap保存文件夹

1. 如何把DC的内容保存为cbitmap

Width为位图的宽 Height为位图的高
CBitmap bmp;
bmp.CreateCompatibleBitmap(DC,Width,Height);
CDC MemDC;
MemDC.CreateCompatibleDC(&DC);
CBitmap *oldbitmap=MemDC.SelectObject(&bmp);
MemDC.BitBlt(0,0,Width,Height,&DC,,0,0,SRCCOPY);
MemDC.SelectObject(oldbitmap);
MemDC.DeleteDC();