void XGameStreamingHideTouchControlsOnClient(  
         XGameStreamingClientId client  
)  

void OnShowMenu(XGameStreamingClientId client)
{
    // This game has native touch support for the menu system, so hide touch overlay controls
    XGameStreamingHideTouchControlsOnClient(client);
}

void OnDismissMenu(XGameStreamingClientId client)
{
    // Show the touch overlay controls which were previously on the screen before we hid them
    // due to bringing up the menu.
    XGameStreamingShowTouchControlsOnClient(client);
}