ATL / WTL / STL

void fn(int* ptr)
{
	(*ptr)++;
}

int _tmain(int argc, _TCHAR* argv[])
{
	std::auto_ptr<int> a(new int(11));	
	fn(a.get());
	cout << "a = " << *a << endl;//prints 12
	return 0;
}

void fn(int*& ptr)
{
}

int _tmain(int argc, _TCHAR* argv[])
{
	std::auto_ptr<int> a(new int(11));	
	int* tmp;
	fn(tmp = a.get());	
	return 0;
}

template <typename T>
class InterfaceAShim : public InterfaceA {
    STDMETHOD(GetWindowHandle)(HWND* phwnd) { return static_cast<T*>(this)->InterfaceA_GetWindowHandle(phwnd); }
};
 
class YourClass : public InterfaceAShim<YourClass>, public InterfaceB
{
   ...
   HRESULT InterfaceA_GetWindowHandle(HWND* phwnd) {
       // do your stuff here for InterfaceA::GetWindowHandle()
   }
      
   STDMETHOD(GetWindowHandle)(HWND* phwnd) {
       // do your stuff here for InterfaceB::GetWindowHandle()
   }
};