how does CR keep track of # of users with ASP?

[earme]

Hello,

I'm looking at CR examples of displaying reports via ASP and they create the report objects in Session variables. When the page is closed they set the variables to nothing and then abandon the session. For the ASP app I'm building though, the users login so I don't want their session to end when they close a report or they'd have to log in again. But when I was playing with their examples and took out the session.abandon it still seemed to count that as one open instance.
So, I'm wondering how CR keeps track of the # of users/sessions viewing reports. Do I have to abandon the session?

Thanks!
Earme