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Snippet Metadata
Summary: ScreenCapture: Captures the primary desktop screen.
Language: C#
Author: Palle Kristensen
Author snippets RSS:
Culture: en-US
Bytes: 1783
Visual Studio 2005 Snippet:

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//Snippet: CaptureScreen.cs
//Author:  Palle Kristensen
//Shared:  08-oct-2005
//Captures the primary desktop screen.
public class ScreenCapture
   private static extern bool BitBlt(
      IntPtr hdcDest, // handle to destination DC
      int nXDest, // x-coord of destination upper-left corner
      int nYDest, // y-coord of destination upper-left corner
      int nWidth, // width of destination rectangle
      int nHeight, // height of destination rectangle
      IntPtr hdcSrc, // handle to source DC
      int nXSrc, // x-coordinate of source upper-left corner
      int nYSrc, // y-coordinate of source upper-left corner
      System.Int32 dwRop // raster operation code

   public static Bitmap PerformCapture()
      Bitmap bm;

      Graphics grfxScreen = Graphics.FromHwnd(IntPtr.Zero);
      // Create a bitmap the size of the screen.
      bm = new Bitmap((int) grfxScreen.VisibleClipBounds.Width, (int) grfxScreen.VisibleClipBounds.Height, grfxScreen);
      // Create a Graphics object associated with the bitmap.
      Graphics grfxBitmap = Graphics.FromImage(bm);
      // Get hdc's associated with the Graphics objects.
      IntPtr hdcScreen = grfxScreen.GetHdc();
      IntPtr hdcBitmap = grfxBitmap.GetHdc();
      // Do the bitblt from the screen to the bitmap.
      BitBlt(hdcBitmap, 0, 0, bm.Width, bm.Height, hdcScreen, 0, 0, 0x00CC0020);
      // Release the device contexts.
      // Manually dispose of the Graphics objects.
      return bm;

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