Hi Allon,
Please check these links.
http://help.syncfusion.com/ug_73/toolswin/AddingBarItemsToABarManager.htmlhttp://help.syncfusion.com/ug_73/toolswin/AddingToolbarsAndPopulatingTheBarItems.htmlIf you use designer to populate sub items, you can drag and drop the items from the Customize Dialog over the parentbarItem.
Also every BarItem is associated with Click event. You can use that event.
http://help.syncfusion.com/ug_73/toolswin/EventsOfBarItem.htmlRegards,
Mano