>>>? dbf()
>>>? used()
>>...and don't forget ALIAS()
>
>I have NEVER used alias() before.
>I usually use select() instead. Will
>you forget about the alias you created? :)

If we concentrate us on the original question, knowing if anything is open in the currently selected area, using select() alone won't help.

 lcOpenArea = ALIAS(SELECT())
IF EMPTY(lcOpenArea)
  * No table/view/cursor is open 
ENDIF