Windows Driver Removal

Hi All,

I search for a way to implement a driver removal into a tool. I know that
by default drivers registered once should resist in the system. Can someone
explain me a way to remove, deregister, etc. drivers ? Is there a manual
from microsoft or someone else available ?
I need to know this for modem and network card device classes.

Your help is much appreciated.

Thanks & Best Regards,
Darius