Problems with code from the FAQ

I'm having some trouble with the code from the Convert a string to a int (C++)
I've only changed it a little bit. Here's what I got so far:

Code:

#include <sstream> 
#include <string>  
#include <iostream>  //I added this
using namespace std;  

bool StringToInt(const string &s, int &i);

int main()
{
  string s1 = "12";
  string s2 = "ZZZ";
  int result;
  
  if (StringToInt(s1, result))
  {
    cout << "The string value is " << s1
         << " and the int value is " << result << endl;
  }
  else
  {
    cout << "Number conversion failed" <<endl;
  }
  if (StringToInt(s2, result))
  {
    cout << "The string value is " << s2
         << " and the int value is " << result << endl;
  }
  else
  {
    cout << "Number conversion failed on " <<s2 <<endl;
  }    
  return 0;
}

bool StringToInt(const string &s, int &i)
{
  istringstream myStream(s);
  
  if (myStream>>i)
    return true;
  else
    return false;
}


/*
 * Program output:
 The string value is 12 and the int value is 12
 Number conversion failed on ZZZ
 *
 */

I get the following error:

--------------------Configuration: onlyatest - Win32 Debug--------------------
Compiling...
thisisatest.cpp
Linking...
LIBCD.lib(wincrt0.obj) : error LNK2001: unresolved external symbol _WinMain@16
Debug/onlyatest.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

onlyatest.exe - 2 error(s), 0 warning(s)


I think the error comes from the fact that "result" is never assigned a value. Can anyone give me a hand on who to fix this? I am using Visual C++ 6.0.

Thanks

Build a console application, not a windows application - either create a new project or change subsystem:windows to subsystem:console in the project settings.