protected CommandBarItem MakeMenu (CommandBar parent, ChoiceGroup group)
{
string label = group.Label.Replace("_", "&");
CommandBarMenu menu = parent.Items.AddMenu(label);
menu.Tag = group;
group.ReferenceWidget = menu;
menu.DropDown += new System.EventHandler(group.OnDisplay);
#if DEBUG
//needed for unit testing
//menu.Click += new System.EventHandler(group.OnDisplay);
#endif
return menu;
}