Calling C++ class methods via a function pointer

How do I obtain a function pointer for a class member function, and later call that member function with a specific object? I’d like to write:

class Dog : Animal
{
    Dog ();
    void bark ();
}

…
Dog* pDog = new Dog ();
BarkFunction pBark = &Dog::bark;
(*pBark) (pDog);
…

Also, if possible, I’d like to invoke the constructor via a pointer as well:

NewAnimalFunction pNew = &Dog::Dog;
Animal* pAnimal = (*pNew)();

Is this possible, and if so, what is the preferred way to do this?