C#

[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]<br />
public static extern int SetStretchBltMode(IntPtr hdcDest, int nStretchMode);<br />
[System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]<br />
public static extern int StretchBlt(IntPtr hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, IntPtr hdcSrc, int nXSrc, int nYSrc, int nWidthSrc, int nHeightSrc, System.Int32 dwRop);<br />
..<br />
..<br />
..<br />
private void CaptureScreen()<br />
{<br />
Graphics mygraphics = this.CreateGraphics();<br />
..<br />
..<br />
IntPtr dc1 = mygraphics.GetHdc(); //Source DC<br />
IntPtr dc2 = here I have to retrieve the available Printer DC as my destination DC //Target DC<br />
<br />
SetStretchBltMode(dc2, 4); //Here 4 is defined for HALFTONE<br />
StretchBlt(dc2, 0, 0, this.ClientRectangle.Width, this.ClientRectangle.Height - 75, dc1, 0, 75, this.ClientRectangle.Width, this.ClientRectangle.Height, 13369376); //Here 13369376 is defined as SRCCOPY<br />
..<br />
..<br />
..<br />
//Saving in a memory stream<br />
memoryImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);<br />
}