public override void OnCreateContextMenu(IContextMenu menu, View v, IContextMenuContextMenuInfo menuInfo)
{
ISubMenu sm = menu.AddSubMenu("File");
sm.Add(Menu.None, IDM_CNTX_OPEN, Menu.None, "Open");
sm.Add(Menu.None, IDM_CNTX_OPEN, Menu.None, "Save");
base.OnCreateContextMenu(menu, v, menuInfo);
}