Ideas for implementing a standard windows form help window?

Question

Hello

I'm trying to implement a standard windows Help window; the ones you see so often in windows application. The ones that have a treeview in the left handside and on the right side theres space to display the help contents.

My question is what control should i use on the right side to show the help contents? And what should my help contents be written in?

should i do:

• a richtextbox and just type my contents in?
• a web browser control, help files in html format and use the web browser control to load them in?
• help files in word doc files and load them in..
• help files in rft files and load into a richtextbox control?
• any other controls i can use and what ideal help file format should i use to implement my form?

any ideas?

thanks