[Help]C++ Text to Speech

#include <sapi.h>



int main(int argc, char* argv[])
{
    ISpVoice * pVoice = NULL;

    if (FAILED(::CoInitialize(NULL)))
        return FALSE;

    HRESULT hr = CoCreateInstance(CLSID_SpVoice, NULL, CLSCTX_ALL, IID_ISpVoice, (void **)&pVoice);
    if( SUCCEEDED( hr ) )
    {
        if(GetAsyncKeyState(VK_INSERT)){
		hr = pVoice->Speak(L"Hello World", 0, NULL);

        // Change pitch
    //    hr = pVoice->Speak(L"This sounds normal <pitch middle = '-10'/> but the pitch drops half way through", SPF_IS_XML, NULL );
        pVoice->Release();
        pVoice = NULL;
    }
	}
    ::CoUninitialize();
    return TRUE;
}