HRESULT XSpeechSynthesizerCreate(  
         XSpeechSynthesizerHandle* speechSynthesizer  
)  

HRESULT Game::SynthesizeSpeech(
    const char* textToSpeak,
    const char* voiceId)
{
    // Create a new speech synthesizer.
    XSpeechSynthesizerHandle ssHandle = nullptr;
    if (FAILED(XSpeechSynthesizerCreate(&ssHandle))) { return E_FAIL; }

    // If a voice ID was specified, attempt to set the speech synthesizer to
    // use the specified voice. Note that voiceId has a default value of nullptr, 
    // as specified in its function declaration.
    if (voiceId != nullptr) 
    {
        if (FAILED(XSpeechSynthesizerSetCustomVoice(ssHandle, voiceId))) { return E_FAIL; }
    }

    // Create a new speech synthesizer stream from the specified text.
    XSpeechSynthesizerStreamHandle ssStreamHandle = nullptr;
    if (FAILED(XSpeechSynthesizerCreateStreamFromText(ssHandle, textToSpeak, &ssStreamHandle))) { return E_FAIL; }

    // Get the size of the buffer needed for the audio data from our stream.
    size_t bufferSize;
    if (FAILED(XSpeechSynthesizerGetStreamDataSize(ssStreamHandle, &bufferSize))) { return E_FAIL; }

    // Define the buffer, then retrieve the audio data from our stream.
    std::vector<char> streamData;
    streamData.resize(bufferSize);
    if (FAILED(XSpeechSynthesizerGetStreamData(ssStreamHandle, bufferSize, streamData.data(), &bufferSize))) { return E_FAIL; }

    // We now have audio data from the speech synthesizer stream, so let's play it. 
    // For the purposes of this example, the sound is played synchronously, so that we don't
    // risk having an outstanding asynchronous operation when we close the stream.
    PlaySoundW(reinterpret_cast<LPCWSTR>(streamData.data()), nullptr, SND_MEMORY);

    // We're done with the speech synthesizer stream, so let's close it.
    if (FAILED(XSpeechSynthesizerCloseStreamHandle(ssStreamHandle))) { return E_FAIL; }

    // We're done with the speech synthesizer, so let's close that, too.
    if (FAILED(XSpeechSynthesizerCloseHandle(ssHandle))) { return E_FAIL; }

    return S_OK;
}