You can examineeither the CAPI representation of any window, or an underlying window, using the Works > Interface menu.
This menu contains the standard action commands described in Performing operations on selected objects. Thus, choose Works > Interface > Browse to browse the platform-specific representation of the CAPI object. From the podium, choose ToolsWorks > Interface > Inspect to examine the CAPI:INTERFACE object for the podium window.
Similarly, you can browse the Common Lisp classes of either the CAPI representation or the library model, or you can inspect their values, or paste them into a listener.
For information about the tools mentioned, see The Class Browser and The Inspectorand The Window Browser.