Detecting termination of any Process/Application

Hi;

I want to keep track the usage (in timely manner) of some programs on
Windows xp/2k.

So I want to write a watcher which logs the start and stop time of any
application.


e.g: for Notepad:
start                 stop
6.2.2008: 11:11:05        6.2.2008: 11:21:05
6.2.2008: 12:10:35        6.2.2008: 12:35:00

getting the process list periodically and comparing current list with
the previous one may be a solution But I hope that there should be a
notification to catch.

So I need to catch processstarted/Processterminated notifications (if
exist).

Any help...:)

Regards.

Faruk