void XGameStreamingShowTouchControlLayoutOnClient(  
         XGameStreamingClientId client,  
         const char* layout  
)  

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