C# Capture Control Graphics

 

[DllImportAttribute("gdi32.dll")]
private static extern bool BitBlt(
IntPtr hdcDest,
int nXDest,
int nYDest,
int nWidth,
int nHeight,
IntPtr hdcSrc,
int nXSrc,
int nYSrc,
int dwRop);

代码

public Bitmap CaptureControl(Control control)
{
    Bitmap controlBmp;
    using (Graphics g1 = control.CreateGraphics())
    {
        controlBmp = new Bitmap(control.Width, control.Height, g1);
        using (Graphics g2 = Graphics.FromImage(controlBmp))
        {
            IntPtr dc1 = g1.GetHdc();
            IntPtr dc2 = g2.GetHdc();
            BitBlt(dc2, 0, 0, control.Width, control.Height, dc1, 0, 0, 13369376);
            g1.ReleaseHdc(dc1);
            g2.ReleaseHdc(dc2);
        }
    }

    return controlBmp;
}

 

 

 

http://www.vcskicks.com/capture-control-graphics.php