Someone

class GameApplication;
class Model;

class GameApplication
{
public:
	GameApplication() { cout << "GameApplication constructed" << endl; }
	~GameApplication() { cout << "GameApplication destructed" << endl; }

	void Model_CONST(Model* Mdl);
	void Model_DEST(Model* Mdl);
};

class Model
{
public:
	Model() { cout << "Model constructed" << endl; }
	~Model() { cout << "Model destructed" << endl; }
	void say_hello() { cout << "Model: HELLO!" << endl; }

};

/////////////////////
void GameApplication::Model_CONST(Model* Mdl) 
{ 
	cout << "Application constructs Model now:" << endl;
	Mdl = new Model; 
}

void GameApplication::Model_DEST(Model* Mdl) 
{ 
	cout << "Application destructs Model now:" << endl;
	delete Mdl; 
}

/////////////////////
int main()
{
	GameApplication* App = new GameApplication;

	Model* Mdl;
	App->Model_CONST(Mdl);
	//Mdl = new Model;

	Mdl->say_hello();

	App->Model_DEST(Mdl);
	//delete Mdl;

	delete App;

	//////////////////
	Console::ReadKey();
}