CommandBarPopup.BuiltIn Property (Office)
Is True if the specified command bar popup is a built-in command bar of the container application. Returns False if it's a custom command bar. Read-only.
The use of CommandBars in some Microsoft Office applications has been superseded by the new ribbon component of the Microsoft Office Fluent user interface. For more information, search Help for the keyword "ribbon."
expression A variable that represents a CommandBarPopup object.