public void Highlight()
{
IntPtr windowDC;
RECT windowRect = new RECT(0, 0, 0, 0);
NativeUtils.GetWindowRect(detectedWindow, ref windowRect);
IntPtr parentWindow = NativeUtils.GetParent(detectedWindow);
windowDC = NativeUtils.GetWindowDC(detectedWindow);
if (windowDC != IntPtr.Zero)
{
Graphics graph = Graphics.FromHdc(windowDC, detectedWindow);
graph.DrawRectangle(drawPen, 1, 1, windowRect.Width - 2, windowRect.Height - 2);
graph.Dispose();
NativeUtils.ReleaseDC(detectedWindow, windowDC);
}
}