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);
protected bool IsCursorOnDivider()
{
HD_HITTESTINFO hti = new HD_HITTESTINFO();
hti.pt.x = LastMousePosition.X;
hti.pt.y = LastMousePosition.Y;
WindowsAPI.SendMessage(hHeader, (int)HeaderControlMessages.HDM_HITTEST, 0, ref hti);
bool hit = (hti.flags == (int)HeaderControlHitTestFlags.HHT_ONDIVIDER);
return hit;
}