All controls, user objects, and menus
The Tag property can hold any text you want to associate with the control. It is up to you how you use that text.
To specify a tag for a control:
Enter the desired text in the Tag field on the General page of the object’s Properties view.
The tag property takes a string value.
The following line uses the object's Tag property to set MicroHelp in an MDI frame (the code could be in a GetFocus event or, for a Menu object, the Selected event).
w_frame.SetMicroHelp(This.Tag)