Thanks for the tip, I used the fopen trick, I remember this for other purposes..
>>Hi All,
>>
>>Using Excel automation I want to open an Excel Workbook if it is not already open. How to check for this?
>>
>
>You can loop through the open workbooks and see if one of them is the one you're interested in:
>
>

>FOR EACH oWB in oXL.Workbooks
>  IF oWB.Name == m.cFileName
>     * Found it
>  ENDIF
>ENDFOR
>

>
>I don't remember offhand whether the Name property is the right one and whether it includes a path, but you can figure that out from Help.
>
>Tamar