private void AFCPanel_Paint(object sender, PaintEventArgs e) { if (memDC != null) { IntPtr hdc = e.Graphics.GetHdc(); IntPtr hMemdc = memDC.GetHdc(); Win32Support.BitBlt(hdc, 0, 0, this.Width, this.Height, hMemdc, 0, 0, Win32Support.TernaryRasterOperations.SRCCOPY); e.Graphics.ReleaseHdc(hdc); memDC.ReleaseHdc(hMemdc); } }