if you want to see who is in using the system then try looking at the lockfile. Forget where but there is a reference soemwhere on this forums or possibly USENET referring to a form developed by Microsoft to view the users of the lockfile. I came accross the form in Access Developers handbook 2000 on
If you want to track who has been using the system then you will need to use write logons to a a table. if you do go down that route then I'd suggest to use the API calls to find out the userid & PC the user is actually using, as opposed to the the environment variables.