Context Based Help

Greetings -

I am trying to figure out how to do help pages for C#. I already have my .chm files created, and I can pull them up in my application. I have managed to do some "context based help" using HelpNavigator. Unfortunately, I cannot figure out how to properly make use of my context numbers, or my context number map for that matter.

Do any of you know the proper way to use context numbers or context number maps?

Thanks,
Garret