void XGameStreamingShowTouchControlLayout(
         const char* layout  
)  

void OnGameStateChanged(GameState newState)
{
    // Toggle to the set of touch overlay controls which best match the new state of the game
    switch (newState)
    {
    case GameState::FirstPersonAction:
        XGameStreamingShowTouchControlLayout("FirstPersonAction");
        break;
    case GameState::Driving:
        XGameStreamingShowTouchControlLayout("Driving");
        break;
    case GameState::CutScene:
        // Don't show any touch overlay controls while the cut scene is rendering
        XGameStreamingHideTouchControls();
        break;
    }
}