Microsoft Speech Api

#define COBJMACROS
#include <sapi.h>
#include <ole2.h>
#include <stdio.h>
int main(int argc, char* argv[])
{
    ISpVoice * pVoice = NULL;
    HRESULT hr;
    if (FAILED(CoInitialize(NULL))) return FALSE;
    hr = CoCreateInstance(&CLSID_SpVoice, NULL, CLSCTX_ALL, &IID_ISpVoice, (void **)&pVoice);
    if( SUCCEEDED( hr ) )
    {hr = ISpVoice_Speak(pVoice, L"Hello world", 0, NULL); ISpVoice_Release(pVoice); pVoice = NULL;}
    CoUninitialize();
    return TRUE;
}