friend operator new/delete - allow obj instantiation only in heap - howto?

Hi all,
All I want to achieve is restricting the object instantiation in stack
and allowing the application to instantiate the object only in heap
using new operator. How to achieve this?

I tried out with the following code.
Could you please give me the reason for the compilation error for the
following code:

#include <iostream>

class Temp
{
public:
    friend void* ::operator new (size_t);
    friend void ::operator delete (void* pDel);
private:
    Temp ()
    {
        std::cout << "Temp Ctor" << std::endl;
    }
    ~Temp ()
    {
        std::cout << "Temp Dtor" << std::endl;
    }
};

int
main ()
{
    Temp *pT = new Temp;
    delete pT;

    // Temp tempObj; // Should be disallowed
    return 0;
}

Compilation error received:
---------------------------------------
heap.cpp: In function 'int main()':
heap.cpp:9: error: 'Temp::Temp()' is private
heap.cpp:22: error: within this context
heap.cpp:13: error: 'Temp::~Temp()' is private
heap.cpp:23: error: within this context

Please help me in instantiating the Temp object only in heap, not in
stack.

thanks
Sukumar R