HRESULT RegisterSystemButtonCallback(
    IGameInputDevice* device,
    GameInputSystemButtons buttonFilter,
    void* context,
    GameInputSystemButtonCallback callbackFunc,
    GameInputCallbackToken* callbackToken
);

Microsoft::WRL::ComPtr<IGameInput> gameInput;

void CALLBACK OnGuideButton(
    _In_ GameInputCallbackToken callbackToken,
    _In_ void * context,
    _In_ IGameInputDevice * device,
    _In_ uint64_t timestamp,
    _In_ GameInputSystemButtons currentButtons,
    _In_ GameInputSystemButtons previousButtons)
{
    bool guidePressed = currentButtons & GameInputSystemButtons::GameInputSystemButtonGuide;
    bool guidePreviouslyPressed = previousButtons & GameInputSystemButtons::GameInputSystemButtonGuide;
    if (guidePressed && !guidePreviouslyPressed)
    {
        // Handle new Guide button press
    }
    else if (!guidePressed && guidePreviouslyPressed)
    {
        // Handle new Guide button release
    }
}

void RegisterForGuideButton() noexcept
{
    GameInputCallbackToken token;
    if (SUCCEEDED(gameInput->RegisterSystemButtonCallback(
        nullptr, // All devices
        GameInputSystemButtons::GameInputSystemButtonGuide, // Filter to the Guide button
        nullptr, // No context
        OnGuideButton, // Callback
        &token))) // token
    {
        // Success!
    }
}