Gets or sets a string that an application can use to execute a command from a CommandBarButton control. Read/write.
The use of CommandBars in some Microsoft Office applications has been superseded by the new ribbon component of the Microsoft Office Fluent user interface.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."
If the specified parameter is set for a built-in control, the application can modify its default behavior if it can parse and use the new value. If the parameter is set for custom controls, it can be used to send information to Visual Basic procedures, or it can be used to hold information about the control (similar to a second Tag property value).