>>Would you share what PEMs you would recommend for a BO base class?
>
>I'm not sure there is a universal set of PEMs that would apply to everyone. In my lowest level cObject class there's PEMs for error and status handling, to broadcast method calls and property setting down into the contained objects.

I am sure you are correct. On the other hand, would you share what has worked for you?

As I said, I am trying to get a good handle on the way to program with business objects. So far I have some of the jargon :) but need a deeper understanding than that. No need to share the classes themselves. Just a description of PEMs in the hierarchy would be very useful.

Thanks a lot. By the way I still use an optiongroup class you shared that handles one char fields rather well. At Init it creates an "active" label that chooses the correct option. Thanks for that as well.

Alex