System Idle Detection

Question

I want to detect if the system is idle, ie: user not using the system. I want it like the Windows Live Messenger it changes automatically to away when I leave the computer for a time like 3 minutes, I want to set this time within the code.

I`m working on the WPF under C# environment using both visual studio 2008 and 2010 so if here is a way that work on both that`ll be great.

Answer 1

There's an article on CodeProject that should get you started.