>>>IF USED('myTable')
>>> SELECT ('myTable')
>>>ELSE
>>> SELECT 0
>>>ENDIF
>>>USE myTable
>>
>>

>>USE myTable IN IIF(USED('myTable'), 'myTable', 0)
>>

>
>Even simpler

>USE myTable IN select('myTable')

Even simpler :)

USE myTable IN myTable

But more dangerous if somthing is open in current workarea.