You can examine any tool window with the Window > Interface menu.
This menu contains the standard action commands described in Performing operations on selected objects. Thus, choose
Window > Interface > Inspect
to inspect the
object for the window.
Choose Window > Interface > Browse - Window to browse the structure of the window object. From here you can browse the child windows and their CAPI representations.
For information about the tools mentioned, see The Class Browser and The Inspector and The Window Browser.