>>>Hi All,
>>>
>>>I developed a copy-protect method with some utitilies from UT and other VFP sources. It looks cpu, hdd serial etc...
>>>I was use .dbf file and lock one record for each user when developing .dbf based applications for RDP users.
>>>How can I control active user counts at SQL Server?
>>
>>You can use the same idea as in VFP. Every time the user log in, you create a new record in the table, say, Logins, and in the application destroy you update this record with the logout time.
>
>What will I do when application crashed?

If application crashed, you can delete (update) all records in that table.