ts wrote: >>>>>>"C" == Christian Szegedy <szegedy / nospam.or.uni-bonn.de> writes: >>>>> > > C> I would encode the id (VALUE) of the class itself in the 1...4 bytes of > C> the name of the data-member. > > Probably I've not understood but when you compile the def you don't have > the id of the class. > > > Guy Decoux > You undestood correectly. If you adapt this solution, then you will have to have the id of the class when wou compile the def. (As I mentionned in my original mail). Is it an inherent problem? Regards, Christian