I would like to know if there is a way to make my application aware of other users on the LAN who are presently logged into the same application. I could create a table, append a record with a user's name when he logs on, and then the other users could query the table to find out who is presently logged on.

I would also like to initiate some action on the other users' machines when a certain condition occurs.

Is there a way to do this directly or through COM/DCOM?

Thanks.
Jay