wysiwyg html editing

Currently I'm trying to make a webpage creator with win32 API, but I don't know how other webpage creators get the html rendering + editing capabilities in a window. I'm a beginner at win32 programming...on MSDN i've seen that one can use MSHTML, something microsoft offers for editing in IE. However, I'm not sure if everyone uses MSHTML or if it offers all the customizable editing features I see in web page creators. Any help appreciated, thanks!