>>>That would be a false negative. A false positive would be a class which is subclassed, but subclasses are never used.
>>
>>Yeah, I did think about that possibility, but I think that would be no problem. After deleting the unused subclasses, I could run the hypothetical process again, and detect the superclass.
>>
>>> Also, if you're using a data-driven class factory, you'd need to check for factory calls, to see if there are dead records in the factory table.
>>
>>I am not sure how that factory thing would work.
>
>Just more work to be done. Usually, a factory object is called with
>
>

oNewObj=oFactory.Create("The Pink Form")

>
>It looks into some factory.dbf for a record with "The Pink Form" in the name field, and uses other fields to retrieve actual class and classlibrary of the object to create. So the additional work here would be to look for all lines containing oFactory.Create().

So, the actual class instantiation would be delegated to the factory class. Actually quite simple, then, at least the basic concept. Thanks for the explanation.