C++ Function pointer

[ChimpFace9000]

I have class thats called game. In the class theres a pointer called m_pDisplay. Its a pointer to a function in the class game. Then another class, CWindow, has a pointer to a game class. In the window class, how do i call the pointer in the game class?

I thought something like... m_pGame is the game pointer.

m_pGame->m_pDisplay()

But nope.