There are 27 child pages and not all of them are present as Hyperlinks in this main page. Link to "Creation of Tool Windows" is not present in this page. But when I twirl open the Child Pages, I saw this. Same thing with "Work with Icons and Images". This page seems to the Main Page, and as a Table of Contents. So all Child Pages should have a link under proper category in this page. That way developers won't miss out on documentation.