naja, vielleicht möchte ja jemand so eine dll programmieren...

Code:

---

template <class PT, class DT> PT _makeContainer(PT* v)
{
	return (*v = (PT)(new DT));
}
template <class PT, class DT> _delContainer(PT* v)
{
	v = dynamic_cast<DT*>(*v)) ? 0 : v;
}
template <class PT, class DT> DT _getValue(PT* v)
{
	return (DT _v = dynamic_cast<DT*>(*v)) ? _v : DT(0);
}
template <class PT, class DT> DT _setValue(PT* v, DT w)
{
	if (DT* _v = dynamic_cast<DT*>(*v)) {
		*_v = w;
	}
}
// ...
DLLFUNC var getDoubleContainer(void)
{
	return _makeContainer<var, double>(new int);
}
// ...

---