>Thanks for the quick response and your *excellent* explanation of the reasoning behind this.
>
>Should the VFP documentation possibly be enhanced to notate this for these objects, as it does with the Session object?

I think the VFP 8.0 docs do already mention this. Take for example the VFP 8.0 help for the Empty class, and the same decription exists for the help on the HeaderClass property, etc.

VFP 8.0 docs: The Empty class is only available within a program (.prg) file and cannot be defined in a visual class library (.vcx) class library.