IGameInput::RegisterDeviceCallback

HRESULT RegisterDeviceCallback(
    IGameInputDevice* device,
    GameInputKind inputKind,
    GameInputDeviceStatus statusFilter,
    GameInputEnumerationKind enumerationKind,
    void* context,
    GameInputDeviceCallback callbackFunc,
    GameInputCallbackToken* callbackToken
);

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

void CALLBACK OnDeviceEnumerated(
    _In_ GameInputCallbackToken callbackToken,
    _In_ void * context,
    _In_ IGameInputDevice * device,
    _In_ uint64_t timestamp,
    _In_ GameInputDeviceStatus currentStatus,
    _In_ GameInputDeviceStatus previousStatus)
{
    // Application-specific code to handle the enumerated device
}

void EnumerateDevicesWorker() noexcept
{
    GameInputCallbackToken token;
    if (SUCCEEDED(gameInput->RegisterDeviceCallback(
        nullptr,                                      // Don't filter to events from a specific device
        GameInputKindGamepad | GameInputKindKeyboard, // Enumerate gamepads and keyboards
        GameInputDeviceAnyStatus,                     // Any device status
        GameInputBlockingEnumeration,                 // Enumerate synchronously
        nullptr,                                      // No callback context parameter
        OnDeviceEnumerated,                           // Callback function
        &token)))                                     // Generated token
    {
        gameInput->UnregisterCallback(token, 5000);
    }
}

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

void CALLBACK OnDeviceConnectionChanged(
    _In_ GameInputCallbackToken callbackToken,
    _In_ void * context,
    _In_ IGameInputDevice * device,
    _In_ uint64_t timestamp,
    _In_ GameInputDeviceStatus currentStatus,
    _In_ GameInputDeviceStatus previousStatus,
    )
{
    if (currentStatus & GameInputDeviceConnected)
    {
        // Application-specific code to handle the device connection
    }
    else
    {
        // Application-specific code to handle the device disconnection
    }
}

void MonitorDeviceConnectionChanges(
    _In_ volatile bool & cancelMonitoring) noexcept
{
    GameInputCallbackToken token;
    if (SUCCEEDED(gameInput->RegisterDeviceCallback(
        nullptr,                                      // Don't filter to events from a specific device
        GameInputKindGamepad | GameInputKindKeyboard, // Listen for Gamepad and Keyboard changes
        GameInputDeviceConnected,                     // Notify on changes to GameInputDeviceConnected status
        GameInputAsyncEnumeration,                    // Enumerate initial devices asynchronously
        nullptr,                                      // No callback context parameter
        OnDeviceConnectionChanged,                    // Callback function
        &token)))                                     // Generated token
    {
        while (!cancelMonitoring)
        {
            Sleep(100);
        }

        gameInput->UnregisterCallback(token, 5000);
    }
}