SAPI C++ example

#include <windows.h>
 #include <servprov.h>
 #include <sapi.h>
 #include <string>
 #include <iostream>
 #include <comstl/error/exceptions.hpp>
 #include <comstl/util/initialisers.hpp>
 #include <comstl/util/creation_functions.hpp>
 #include <stlsoft/smartptr/ref_ptr.hpp>
 #include <winstl/conversion/char_conversions.hpp>

 namespace stlsoft {
 namespace comstl_project {
     COMSTL_IID_TRAITS_DEFINE(ISpVoice)
 }
 }

 class mySpeech {
     public:
         mySpeech() {
             static comstl::com_initializer coinit;
             HRESULT hr;
             if(FAILED(hr = comstl::co_create_instance(CLSID_SpVoice,_pVoice)))
                 throw comstl::com_exception("Failed to create SpVoice COMinstance",hr);
         }
         int sayit(const char* s, int n) {
             std::string(s,n);
             _pVoice->Speak(winstl::a2w(s), SPF_ASYNC, 0);
             return n;
         }
         void setRate(long n) { _pVoice->SetRate(n); }
     private:
         //COM object smart pointer
         stlsoft::ref_ptr<ISpVoice> _pVoice;
 };
 // Main
 int main() {
     class mySpeech *msp;
     try {
         msp = new mySpeech();
     } catch (comstl::com_exception &e){
         std::cerr<< "error";
     }
     const char* str="hello, world";
     msp->sayit(str,13);
     return 0;
 }