public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref HD_HITTESTINFO hti);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref HD_HITTESTINFO hti);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref HD_HITTESTINFO hti);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref HD_HITTESTINFO hti);