How the push_back of stl::vector is implemented so it can make copy of any datatype .. may be pointer, double pointer and so on ...

I'm implementing a template class having a function push_back almost similar to vector. Within this method a copy of argument should be inserted in internal memory allocated memory. but the argument is a pointer. (an object pointer).

Can you pls tell how to create copy from pointer. so that if i delete the pointer in caller still the copy exists in my template class?

Code base is as follows:

template<typename T>
class Vector
{
    public:
        void push_back(const T& val_in)
        {
            T* a = *(new T(val_in));
            m_pData[SIZE++] = a; 
        }
}

Caller:

Vector<MyClass*> v(3);

MyClass* a = new MyClass();
a->a = 0;
a->b = .5;
v.push_back(a);

delete a;

Thanks.