Netværksprogrammering 2 - TCP client sockets

Kode 

#include <windows.h>
#include <string>
#include <iostream>
#include <winsock2.h>

std::string GetHostName(unsigned int aNr)
{
   HOSTENT* Hostent =  gethostbyaddr((const char*)&aNr, 4, AF_INET);
   if(!Hostent)
      return "NULL";
   return Hostent->h_name;
}

int main()
{
   WSADATA wsaData;
   WSAStartup(MAKEWORD(2,2),&wsaData);

   unsigned int Addr = inet_addr("195.137.194.128");
   std::cout << std::hex << Addr << std::endl;
   std::cout << GetHostName(Addr) << std::endl;
}