GtkHtml3 Documentation
 

Specifically, is there any? Anywhere, because I can't find it. The best I've got is a header file devoid of comments. I would love to use this in an email composer that I'm writing, but I can't find an API reference or anything.

Or perhaps could someone name a project that uses gtkhtml3? I find plenty that use gtkhtml2, but I need editing capabilities. Also, there's still some gtkhtml(1) out there, but I'd love to find a project that's definitely using gtkhtml3.

After a decent search, I'm finding a lot of nothing. I did come up with the fact that gtkhtml3 is what evolution is using, so I'll look into that.

In the gtkhtml-3.whatever folder there is usually
a file called testgtkhtml.c.

Have you had a look at that yet?