>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?

With sufficient permissions (VIEW SERVER STATE specifically), you can work with the sp_who stored procedure.. http://msdn.microsoft.com/en-us/library/ms174313.aspx

make sure you give your application a name in the connection string by the way - makes this much easier to filter!