constants ItemTypeEnum
Defines the type of the item being added.  The Add property adds a new item of specified type. Use the Items property to access the collection of items in the control.

NameValueDescription
Default0 Specifies a non popup item.
Separator1 Specifies a separator item.
SubMenu2 Specifies a sub menu.
SubControl3 Specifies a popup menu that hosts an ActiveX control.