>>Hi,
>> I need to check if Microsoft Excel is installed for use this:
>>
>>this.oExcelSession = CreateObject("Excel.Application")
>>
>> If it's not installed I get an error message.
>>
>>T.I.A.
>You might use an ON ERROR handler that checks for a 1429 Error (i think). You'd have to work out the isolation routines to assure that the attempted instanciation was the culprit (like lineno or program()). Evaluate Ko's suggestion too.

I believe the error returned would be 'Class definition not found' (1733) if Excel is not present. 1429 would only be returned from the oleserver after it had been sucessfully instantiated.

Jon