ASP.NET and Help file

I am trying to get some input in regard to creating a help file:

开发者_开发问答
1. Prefered to have a help show up based on what active screen is.
2. Obviosuly, it can be searched
3. It can be browse
4. So it's like normal help file if you press F1 for Internet Explorer that sort of thing.

I'm appreciated your feedback

Thanks

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"Help" for web applications it's just additional pages with help subject related to current page, search form, help content, etc.

Nothing special here is needed. :)