Running a timer in "background" or in standby mode

Hi all,

I've designed a simple timer
But when my Pocket PC (WM5) goes into standby mode or "asleep" the timer momentarily stops and resume from where it stopped when the PPC wakes up.

What can I do to make my timer runs even when the PPC is "off"?

In VB.Net please, and using CF2

Regards,

Johnny