I used doxygen to create HTML files, now I want to convert that documentation into .chm format.
How can I do this?
NDoc is a dead project, it's successor is Sandcastle & Sandcastle Helpfile Builder.
I've used both of the Sandcastle items. They're easy to setup, have decent documentation and chm file generation is native to the application. If you can switch, it would be a much better choice than doxygen.
Otherwise check out this link for HTML to chm info: http://younsi.blogspot.com/2007/04/doxygen-to-html-to-chm.html