Thank you Robert for your answers!
No problem - I love to talk!
On the boost-users mailing list are some questions and testcode which did not work which tried to do that kind of stuff. As far as i remember, your answer was, that it was important to get the project settings right. So i tried to do my homework ;) and made an example. It wasn't clear to me, what project settings are needed. First i tried with my classes, but it did not work. Then i copied your files and it did not work. Only after coping your settings changed that. May it be possible to add an explanation which requirements are needed for serialization via abstract interfaces in dlls in the documentation of the serialization library?
Great idea, please write this up so I can add it to the docs. Thanks for your help. Robert Ramey