First of all, an html generator is a program that operates similar to a word processor or publishing program like word or appleworks, and creates all the html in the background. Therefore they will be relatively familiar in their interfaces. Here are some overview links to look at for specific programs:

Microsoft word: http://www.mae.ucsd.edu/designcenter/guides/howto/how_to_write_web_pages.html

more to be written on this later...