net cf绘制透明图片

 

public static void DrawImageTransparent(Graphics gx, 
        Image image, Rectangle destRect)
{

         ImageAttributes imageAttr = new ImageAttributes();

         Color transpColor = GetTransparentColor(image);

         imageAttr.SetColorKey(transpColor, transpColor);

         gx.DrawImage(image, destRect, 0, 0, image.Width,   
         image.Height, GraphicsUnit.Pixel, imageAttr);

}



private static Color GetTransparentColor(Image image)
{

   return ((Bitmap)image).GetPixel(image.Width - 1,
           image.Height - 1);

}