[DUG] CPU usage

[John Bird]

Is there a simple way to find simple measure of current CPU usage?

Reason - have some housekeeping tasks that I would prefer to not run if the
computer is loaded at the moment, so an easy way to check before starting it
would be great.

Does not have to be too precise for my case, basically something that
answers "is the computer really busy or mainly idle at the moment?"

Here is a couple of examples I found -  wondering if there is a simpler call
for XP/Vista/Windows 7
http://www.swissdelphicenter.ch/torry/showcode.php?id=969
http://www.vbforums.com/showthread.php?t=343530

John