Francisco,

>Regards, i stay in doubt about the interfaces (UML) and what is his relevancy in OOP MM VFP development , when i can use the interfaces?
>
>i start a dev with UML and roundtrip, but i have a class like Article, and i add aggregation for oArticleMarketing object, where i put all methods and properties for this departament, and make mi BO Light, but it's good add anothers n class for every department (Marketing, Account, Financial, etc)?>>

I don't really understand the question...could you reword it add a little more detail?

Regards,