Expression Web is a pretty good WYSIWYG editor. Frontpage (although it is discontinued) helped people get a website online without knowing a bit of code (but the code it produced was pretty bad from time to time).

Expression Web creates compliant code for the most part - a lot better than Frontpage and probably about the same, if not better, than Dreamweaver. However, you really should know / understand the basics of HTML before trying to build a website.