public static extern bool InvalidateRect(IntPtr hWnd, ref RECT rect, bool erase);
public static extern bool DrawFocusRect(IntPtr hWnd, ref RECT rect);
public static extern int GetClipBox(IntPtr hDC, ref Win32.RECT rectBox);
public static extern bool GetWindowRect(IntPtr hWnd, ref RECT rect);
public static extern IntPtr CreateRectRgnIndirect(ref Win32.RECT rect);