Windows auto log off

Hello,

I wrote a program in Perl for windows and using that on Windows XP. It
has a Start and Stop button and the program starts running when the
user click on the Start button. Now I want to add some code in my
program so that when the Windows Auto Log Off triggered (if the
computer is idle for 15 minutes), at the same time my program will
stop running. I don't know how to synchronize my program with Windows
auto log off option. I would appreciate any help/idea.

Thanks.

Babul