I have an application that has multiple windows that are available for display.  I would like for the user to be able to
 select which window is opened from a list of available windows.  My plan was to populate the list with the instance 
name of each window.  However, I could not find a function that would allow me to lookup an internal link using the 
instance name string.  Therefore, I could not map the user's selection to parameters needed by ApCreateModule().

I similar problem was solved by repeated calls to PtWidgetFamily(), getting the ApInstanceName() for each widget and 
comparing that to the selection string.  However, I do not know of a hierarchy I can traverse for widgets/modules that 
have not been created.  If there is one let me know, I am currently thinking of searching through the AbWidgets[] array.