/////////////////////////////////////////////////////////////////////
// CallDotNet.cpp - Implementation of C++ client for               //
//                  IHello interface, using COM to .Net interop    //
//                                                                 //
// Jim Fawcett, CSE775 - Distributed Objects, Spring 2004          //
/////////////////////////////////////////////////////////////////////

#import "..\CSharpLib\bin\debug\CSharpLib.tlb" no_namespace named_guids
#include <atlbase.h>
#include <iostream>

void main()
{
  std::cout << "\n  Calling C# Class Method from COM Client";
  std::cout << "\n =========================================\n";
  try
  {
    ::CoInitialize(NULL);

    HRESULT hr = S_OK;
    IHello* pHello = NULL;

    hr = ::CoCreateInstance(
             CLSID_CHello,NULL,CLSCTX_ALL,IID_IHello,(void**)&pHello
           );

    if(!SUCCEEDED(hr))
      throw std::exception("CoCreateInstance failed");
    
    hr = pHello->sayHello();
    
    if(!SUCCEEDED(hr))
      throw std::exception("Call to sayHello() failed");
    
    pHello->Release();

    ::CoUninitialize();
  }
  catch(std::exception& e)
  {
    std::cout << "\n  " << e.what() << "\n\n";
  }
  std::cout << "\n  press key to quit: ";
  char ch;
  std::cin >> ch;
}