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/// <summary>
/// Klasse zum erzeugen beliebiger Screenshots
/// </summary>
public class Screenshot
{
public Screenshot()
{
}
private struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
[DllImport("user32.dll")]
private static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
[DllImport("user32.dll")]
private static extern int GetForegroundWindow();
/// <summary>
/// Erzeugt ein Screenshot vom gesamten Desktop.
/// </summary>
/// <returns>Bitmap</returns>
public Bitmap WholeDesktop()
{
return CreateScreenshot(0, 0, Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
}
/// <summary>
/// Erzeugt ein Screenshot vom übergebenen Bereich.
/// </summary>
/// <param name="topleft">Punkt des Bereich oben - links</param>
/// <param name="bottomRight">Punkt des Bereich unten - rechts</param>
/// <returns>Bitmap</returns>
public Bitmap UserDefined(Point topleft, Point bottomRight)
{
return CreateScreenshot(topleft.X, topleft.Y, bottomRight.X, bottomRight.Y);
}
/// <summary>
/// Erzeugt ein Screenshot vom Fenster des übergebenen Handels
/// </summary>
/// <param name="windowhandle"></param>
/// <returns>Bitmap</returns>
public Bitmap UserDefinedWindowHandle(IntPtr windowhandle)
{
return CreateScreenshot(windowhandle);
}
/// <summary>
/// Erzeugt ein Screenshot vom aktiven Fenster.
/// </summary>
/// <returns>Bitmap</returns>
public Bitmap ActiveWindow()
{
return CreateScreenshot((System.IntPtr)GetForegroundWindow());
}
private Bitmap CreateScreenshot(int left, int top, int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bmp);
g.CopyFromScreen(left, top, 0, 0, new Size(width, height));
g.Dispose();
return bmp;
}
private Bitmap CreateScreenshot(IntPtr windowhandle)
{
RECT windowRectangle;
GetWindowRect(windowhandle, out windowRectangle);
return CreateScreenshot(windowRectangle.Left, windowRectangle.Top, windowRectangle.Right - windowRectangle.Left, windowRectangle.Bottom - windowRectangle.Top);
}
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