You have to be careful with this method to not unlock the user record. That's why I like my solution.

>
>Create a table with as many records as you will have users (or more, doesn't matter). Lock a record for each user.
>
>

>locate for rlock()
>if recno() > MAX_USERS
>  ErrorMsg("You have reached the maximum number of users.")
>  return
>endif
>