TTBItemContainer
Description:
This non-visual component is a container for items. Like TTBToolbar, double-click it in the form designer to invoke the Item Editor.
By itself, TTBItemContainer is not useful. It is intended to be "linked" to another toolbar item via the LinkSubitems property. You cannot directly assign a TTBItemContainer to a LinkSubitems property, but you can create a TTBSubmenuItem-type item inside the TTBItemContainer, and assign that to a LinkSubitems property.