CommandBarButton.BuiltIn Property (Office)
Is True if the specified command bar control is a control of the container application. Returns False if it's a custom control, or if it's a built-in control whose OnAction property has been set. Read-only.
Note
The use of CommandBars in some Microsoft Office applications has been superseded by the new ribbon component of the Microsoft Office Fluent user interface.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."
Syntax
expression .BuiltIn
expression A variable that represents a CommandBarButton object.
Return Value
Boolean