C++语音识别接口快速入门（Microsoft Speech SDK）
尤其注意其中的宽字符串转化

#include <iostream>
#include <sapi.h> //导入语音头文件
#include <string>
#pragma comment(lib,"sapi.lib") //导入语音头文件库

void  MSSSpeak(LPCTSTR speakContent)// speakContent为LPCTSTR型的字符串,调用此函数即可将文字转为语音
{
    ISpVoice *pVoice = NULL;

    //初始化COM接口

    if (FAILED(::CoInitialize(NULL)))
        MessageBox(NULL, (LPCWSTR)L"COM接口初始化失败！", (LPCWSTR)L"提示", MB_ICONWARNING | MB_CANCELTRYCONTINUE | MB_DEFBUTTON2);

    //获取SpVoice接口

    HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void**)&pVoice);


    if (SUCCEEDED(hr))
    {
        pVoice->SetVolume((USHORT)100); //设置音量，范围是 0 -100
        pVoice->SetRate(0); //设置速度，范围是 -10 - 10
        hr = pVoice->Speak(speakContent, 0, NULL);

        pVoice->Release();

        pVoice = NULL;
    }

    //释放com资源
    ::CoUninitialize();
}
int main()
{
    std::wstring a = L"我爱谢贤";
    LPCWSTR str = a.c_str();
    /*不知道为什么Cstr不行*/
    MSSSpeak(str);
    return 0;
}