GUI docs?

I have been creating "stuff" in with the GUI. I created the docs using the "make html_docs" command, but a lot of the widgets do not have any information. For instance:
GuiEditCtrl
GuiArrayCtrl

It says what the functions do, but no overall "this is how this part fits into the grand scheme of things" stuff. I get the idea the array control is inherited by other controls to do certain things. The GuiEditCtrl is not inherited by anything. It has interesting functions that made me think it was for creating a widget editor of sorts. I tried putting a button in it so maybe I could drag the widget around. It just crashed with seg fault.

Is there a document I am just missing that tells where the GUI pieces fit?

Thanks,
Frank