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Message: [QUOTE="Alipha, post: 2517110"] yes. you can't cast from void* because the compiler can't know what type the object really is. you can only cast from polymorphic types (in which case, the compiler typically looks at the v-table pointer to determine what type the object really is). void construct(void * t); void construct(object * t); problem solved? the cast is completely unnecessary, T* converts to void* implicitly, where T is not a function or member function type. of course, if you convert to void*, you lose all type info, which probably isn't a good thing. you might want to consider boost::any, however that probably won't help with your overall design. [URL="http://www.boost.org"]www.boost.org[/URL] quite frankly, any program design which includes such an incredibly generic object base class usually smells of a bad design. you can't do anything with this object other than construct or destroy it. you'd have to cast to a more specific derived class type to do anything useful with it, which trying to figure out what derived class to cast to is generally a "fun" exercise. C++ doesn't have an object base class for a reason. [/QUOTE]