Hi Andreas, I think the problem you are running into is because you have... CBaseTestClass* pClass; ...but you are not setting to the pointer to a valid object. It's just a random garbage value. If you change your code to this... CBaseTestClass* pClass = new CBaseTestClass; ...your code should work. (It worked for me. I also removed all your inlines, and made them non-inline in the program.cpp file, and put in virtual destructors for both classes.) HTH, --Eljay
