HRESULT XGameStreamingGetSessionId(
        XGameStreamingClientId client,
        size_t sessionIdSize,
        char* sessionId,
        size_t* sessionIdUsed
)

// Register for client properties changed notifications 
void GameStreamingClientManager::OnClientConnected(XGameStreamingClientId client)
{
    XGameStreamingClientPropertiesChangedRegistrationToken token = {0};
    XGameStreamingRegisterClientPropertiesChanged(
            client, m_taskQueue, this, &OnClientPropertiesChanged, &token);
}

void GameStreamingClientManager::OnClientPropertiesChanged(
    void* context,
    XGameStreamingClientId client,
    uint32_t updatedPropertiesCount,
    XGameStreamingClientProperty* updatedProperties)
{
    for (uint32_t i = 0; i < updatedPropertiesCount; ++i)
    {
        switch (updatedProperties[i])
        {
        case XGameStreamingClientProperty::SessionId:
        {
            // allocate memory for sessionId
            char sessionId[SessionIdMaxBytes];

            // get session id of the client
            size_t bytesUsed = 0;
            HRESULT hr = XGameStreamingGetSessionId(client, _countof(sessionId), sessionId, &bytesUsed);

            if (SUCCEEDED(hr)) {
                // Game logic to use session id
            }
            else if (hr == E_GAMESTREAMING_NO_DATA) {
                // Game logic to handle no data for client
            }
            else
            {
                // Default error case
                LogFormat(L"XGameStreamingGetSessionId failed %x", hr);
            }

            break;
        }

        default:
            // A characteristic we are not tracking - do nothing
            break;
        }
    }
}