请看下面的代码
主文件
    #define _ATL_APARTMENT_THREADED
#include <atlbase.h>
//You may derive a class from CComModule and use it if you want to override something,
//but do not change the name of _Module
extern CComModule _Module;
#include <atlcom.h>
#include <sapi.h>
#include <iostream>
using namespace std;
int main(int argc, char* argv[])
{
    cout << "Hello" << endl;
    ISpVoice * pVoice = NULL;
    if (FAILED(::CoInitialize(NULL)))
        return FALSE;
    HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **)&pVoice);
    if( SUCCEEDED( hr ) )
    {
        cout << "Succeeded" << endl;
        hr = pVoice->Speak(L"Hello world", 0, NULL);
        pVoice->Release();
        pVoice = NULL;
    }
    else
    {
        cout << "Not succeeded" << endl;
    }
    ::CoUninitialize();
    return TRUE;
}
当我运行此代码时,窗口打开,打印“Hello”消息。但没有声音出来!它应该说“Hello World”!为什么是这样?
以下是 QT .pro 设置,以防需要
以下是 QT .pro 设置
#-------------------------------------------------
#
# Project created by QtCreator 2013-05-03T14:31:00
#
#-------------------------------------------------
QT       += core
QT       -= gui
TARGET = Speech
CONFIG   += console
CONFIG   -= app_bundle
TEMPLATE = app
SOURCES += main.cpp
INCLUDEPATH += "C:/Program Files/Microsoft Speech SDK 5.1/Bin"
INCLUDEPATH += "C:/Program Files/Microsoft Speech SDK 5.1/Include"
LIBS += "C:/Program Files/Microsoft Speech SDK 5.1/Lib/i386/sapi.lib"
LIBS += "C:/Program Files/Microsoft SDKs/Windows/v7.0A/Lib/User32.lib"