C ++'speechapi_cxx.h':没有这样的文件或目录Visual Studio

我正在Visual Studio 2019上尝试语音转换为文本函数。我在Microsoft网站上找到了此代码,但编译器显示``speechapi_cxx.h'':没有此类文件或目录。

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#include <iostream> // cin, cout
#include <speechapi_cxx.h>

using namespace std;
using namespace Microsoft::CognitiveServices::Speech;

void recognizeSpeech() {
    // Creates an instance of a speech config with specified subscription key and service region.
    // Replace with your own subscription key and service region (e.g., "westus").
    auto config = SpeechConfig::FromSubscription("YourSubscriptionKey", "YourServiceRegion");

    // Creates a speech recognizer
    auto recognizer = SpeechRecognizer::FromConfig(config);
    cout << "Say something...\n";

    // Starts speech recognition, and returns after a single utterance is recognized. The end of a
    // single utterance is determined by listening for silence at the end or until a maximum of 15
    // seconds of audio is processed.  The task returns the recognition text as result. 
    // Note: Since RecognizeOnceAsync() returns only a single utterance, it is suitable only for single
    // shot recognition like command or query. 
    // For long-running multi-utterance recognition, use StartContinuousRecognitionAsync() instead.
    auto result = recognizer->RecognizeOnceAsync().get();

    // Checks result.
    if (result->Reason == ResultReason::RecognizedSpeech) {
        cout << "We recognized: " << result->Text << std::endl;
    }
    else if (result->Reason == ResultReason::NoMatch) {
        cout << "NOMATCH: Speech could not be recognized." << std::endl;
    }
    else if (result->Reason == ResultReason::Canceled) {
        auto cancellation = CancellationDetails::FromResult(result);
        cout << "CANCELED: Reason=" << (int)cancellation->Reason << std::endl;

        if (cancellation->Reason == CancellationReason::Error) {
            cout << "CANCELED: ErrorCode= " << (int)cancellation->ErrorCode << std::endl;
            cout << "CANCELED: ErrorDetails=" << cancellation->ErrorDetails << std::endl;
            cout << "CANCELED: Did you update the subscription info?" << std::endl;
        }
    }
}

int main(int argc, char** argv) {
    setlocale(LC_ALL, "");
    recognizeSpeech();
    return 0;
}