/// <summary>
/// 本方法在开启Aero特效后可以截取被遮挡的窗口及最小化的窗口
/// </summary>
/// <param name="hwnd"></param>
/// <returns></returns>
public static Bitmap BitBltWindow(IntPtr hwnd)
{
RECT rc;
Win32Helper.GetWindowRect(hwnd, out rc);
if (rc.Width < 2 || rc.Height < 2)
{
return(null);
}
Bitmap bmp = new Bitmap(rc.Width, rc.Height, PixelFormat.Format32bppArgb);
Graphics gfxBmp = Graphics.FromImage(bmp);
IntPtr hdcBitmap = gfxBmp.GetHdc();
IntPtr hdcSrc = Win32Helper.GetDC(hwnd);
Win32Helper.BitBlt(hdcBitmap, 0, 0, bmp.Width, bmp.Height, hdcSrc, 0, 0, 0x00CC0020);
gfxBmp.ReleaseHdc(hdcBitmap);
gfxBmp.Dispose();
return(bmp);
}
public static Bitmap BitBltWindow(IntPtr hwnd, Rectangle rect)
{
RECT rc;
Win32Helper.GetWindowRect(hwnd, out rc);
if (rc.Width < 2 || rc.Height < 2)
{
return(null);
}
int xMin = 0;
int yMin = 0;
int xMax = rc.Width;
int yMax = rc.Height;
if (rect != null)
{
xMin = Math.Max(0, rect.X);
yMin = Math.Max(0, rect.Y);
xMax = Math.Min(xMax, rect.Right);
yMax = Math.Min(yMax, rect.Bottom);
}
int width = xMax - xMin;
int height = yMax - yMin;
if (width < 1 || height < 1)
{
return(null);
}
Bitmap bmp = new Bitmap(width, height, PixelFormat.Format32bppArgb);
Graphics gfxBmp = Graphics.FromImage(bmp);
IntPtr hdcBitmap = gfxBmp.GetHdc();
IntPtr hdcSrc = Win32Helper.GetDC(hwnd);
Win32Helper.BitBlt(hdcBitmap, 0, 0, bmp.Width, bmp.Height, hdcSrc, xMin, yMin, 0x00CC0020);
gfxBmp.ReleaseHdc(hdcBitmap);
gfxBmp.Dispose();
return(bmp);
}
