public static Bitmap GetDesktop()
{
IntPtr dC = WindowsAPI.GetDC(WindowsAPI.GetDesktopWindow());
IntPtr intPtr = WindowsAPI.CreateCompatibleDC(dC);
int systemMetrics = WindowsAPI.GetSystemMetrics(0);
int systemMetrics2 = WindowsAPI.GetSystemMetrics(1);
IntPtr intPtr2 = WindowsAPI.CreateCompatibleBitmap(dC, systemMetrics, systemMetrics2);
Bitmap result;
if (intPtr2 != IntPtr.Zero)
{
IntPtr hgdiobjBm = WindowsAPI.SelectObject(intPtr, intPtr2);
WindowsAPI.BitBlt(intPtr, 0, 0, systemMetrics, systemMetrics2, dC, 0, 0, 13369376);
WindowsAPI.SelectObject(intPtr, hgdiobjBm);
WindowsAPI.DeleteDC(intPtr);
WindowsAPI.ReleaseDC(WindowsAPI.GetDesktopWindow(), dC);
Bitmap bitmap = Image.FromHbitmap(intPtr2);
WindowsAPI.DeleteObject(intPtr2);
GC.Collect();
result = bitmap;
}
else
{
result = null;
}
return(result);
}
/// <summary>
/// 截取桌面指定区域的矩形
/// </summary>
/// <param name="rectangle"></param>
/// <returns></returns>
public static Bitmap GetDesktop(System.Drawing.Rectangle rectangle)
{
IntPtr dC = WindowsAPI.GetDC(WindowsAPI.GetDesktopWindow());
IntPtr intPtr = WindowsAPI.CreateCompatibleDC(dC);
IntPtr intPtr2 = WindowsAPI.CreateCompatibleBitmap(dC, rectangle.Width, rectangle.Height);
Bitmap result;
if (intPtr2 != IntPtr.Zero)
{
IntPtr hgdiobjBm = WindowsAPI.SelectObject(intPtr, intPtr2);
WindowsAPI.BitBlt(intPtr, 0, 0, rectangle.Width, rectangle.Height, dC, rectangle.X, rectangle.Y, 13369376);
//WindowsAPI.SelectObject(intPtr, hgdiobjBm);
WindowsAPI.DeleteDC(intPtr);
WindowsAPI.ReleaseDC(WindowsAPI.GetDesktopWindow(), dC);
Bitmap bitmap = Image.FromHbitmap(intPtr2);
DeleteObject(intPtr2);
result = bitmap;
bitmap = null;
}
else
{
result = null;
}
return(result);
}