public static void DrawAdorner(IntPtr hwnd, Action<Graphics, Size> drawMethod = null)
{
var windowRect = new RECT(0, 0, 0, 0);
NativeMethods.GetWindowRect(hwnd, ref windowRect);
var parentWindow = NativeMethods.GetParent(hwnd);
IntPtr windowDC;
windowDC = NativeMethods.GetWindowDC(hwnd);
if (windowDC == IntPtr.Zero) return;
if (drawMethod == null)
drawMethod = DrawDefaultAdorner;
try
{
using (var g = Graphics.FromHdc(windowDC, hwnd))
drawMethod(g, windowRect.Size);
}
finally { NativeMethods.ReleaseDC(hwnd, windowDC); }
}
public static extern IntPtr GetWindowRect(IntPtr hwnd, ref RECT rc);