AGCode documentation - is it available?

Advanced Guestbook is a fine Guestbook. But it uses AGCode instead of the more common BBCode to allow formatting. Is there a reference of what AGCode is and how to use it? BBCode has those nice buttons and a display of the actual code. If this is supposed to be happening in Advanced Guesbook, it isn't in my latest copy.
Thanks!
Tray

agcode is simply the abbreviation for advanced guestbook code as bbcode is bulletin board code, its a simplified version.
mine doesnt seem to want to work, so id be looking for ways to fix and alter it for the future if i find a solution ill let you know, smilies work but url and img dont work using the ag fuction. why i dont know.