GetBitmapBits获取DDB数据

BITMAP bitmap;
　　GetObject(hBitmap, sizeof(BITMAP), &bitmap);
　　DWORD dwSize = bitmap.bmHeight * bitmap.bmWidthBytes;
　　unsigned char* pBits = new unsigned char[dwSize];
　　LONG dl = GetBitmapBits(hBitmap, dwSize, pBits);