>>>>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.

My version is always safe, unless mytable is used alias something other than mytable.