[Unicorn]

I hope I understand the problem correctly.

The anatomy of a pointer to a (virtual) member function in Base looks like this:

return_type (Base::*)(param_type);

If you want to store a pointer to a member function, and call it later on, you must invoke it on an object:

class Base
{
public:
    virtual void Foo () { cout << "Foo in Base" << endl; }
};

class Derived : public Base
{
public:
    virtual void Foo () { cout << "Foo in Derived" << endl; }
};

int main ()
{
    typedef void(Base::*FunctionPtr)();

    FunctionPtr foo_function = &Base::Foo;

    Base Obj1;
    Derived Obj2;

    (Obj1.*(foo_function))();
    (Obj2.*(foo_function))();

    return 0;
}