public static extern int FillRect(IntPtr hDC, ref Win32.Rect lprc, IntPtr hbr);
public static extern int ScrollWindowEx(IntPtr hWnd, int dx, int dy, ref Win32.Rect prcScroll, ref Win32.Rect prcClip, IntPtr hrgnUpdate, IntPtr prcUpdate, int flags);
public static extern int DrawTextEx(IntPtr hdc, string lpchText, int cchText, ref Win32.Rect lprc, uint dwDTFormat, [In][Out] Win32.DrawTextParams lpDTParams);
public static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref Win32.Rect lParam);