Thanks for the response. I have programs which indicates which users are logged into that one in particular. What I wanted was for a generic program to send some messages to all the NT users, view their screen etc, shutdown their PC etc. (I know that's too much but I guess its possible without having to create a table and all the users to check for this table every now and then). I wanted to use Winsock to do that and try.

I was just wondering, when we double click the "Network Neighborhood" it pops up with all the active users. There must be somewhere in NT server this information must have been stored. Isn't it?

Thanks & regards
Vijay