The main frame bar manager is associated with an MDI container form in the MDI scenario or with the top-level form in a single document scenario, to help build a full VS.NET style customizable menu and toolbar interface to your apps.
Bar managers come with full design-time support and let users add menus and toolbars and fill them with items, all without writing a single line of code. The customize dialog facilitates customization of the menus. It is available to the developer during design time and to the end user during run time. Main frame bar manager items can be seen in the customization dialog at design time.