Is there a way to find out when user XXX logged in and out from WinXP on e.g. last Tuesday ?

I could imagine that there is an event log entry written.
However I do not see it. Do I have to enable "User logon/logoff event log records" somewhere ?

If these kind of events are not logged: Is there another way (work around) to write
(automatically) event log records (in the future) when users log off?

How can I (as normal user) write easily log records into the system log (e.g. from command line)?

Martin