As you know, Devhelp is an API documentation browser for GTK+ and GNOME. It by default have included reference for many GTK+ related libraries but it doesn't have Gtkmm, the C++ wrapper for GTK+, which has an online reference in gnome official reference website.
I need to get an offline reference for Gtkmm so I can keep studying while not online. I read in the description of Murrayc web page that this can be added somehow, but that link and webpage seem to dead long ago.
So,is there a way to add this official library reference to my Devhelp app?