Hallo! Okay, everytime I write the question I find the mistake myself :-) I must define the Container Type of course in the base class ! Now everything is working !! (at least with g++!) Thanks again, LG Georg -- GMX ProMail mit bestem Virenschutz http://www.gmx.net/de/go/mail +++ Empfehlung der Redaktion +++ Internet Professionell 10/04 +++