char LocalHostName[20];
WSAData wsaData;
if (WSAStartup(MAKEWORD(2, 0), &wsaData) != 0)
  {
  // attempt to start up the WindowsSocketAPI failed ...
  std::cout << "Error starting up the WSA
";
  system("pause");
  throw -1;
  }
if (gethostname(LocalHostName, sizeof(LocalHostName)) == SOCKET_ERROR)
  {
  std::cout << "Error getting a local machine host name
";
  system("pause");
  throw -1;
  }
LPHOSTENT hostEntry = gethostbyname(LocalHostName);
SOCKADDR_IN MyIPAddress;
MyIPAddress.sin_addr = *((LPIN_ADDR)*hostEntry->h_addr_list);
std::cout << static_cast<int>(MyIPAddress.sin_addr.S_un.S_un_b.s_b1) << "." << static_cast<int>(MyIPAddress.sin_addr.S_un.S_un_b.s_b2) << "." << static_cast<int>(MyIPAddress.sin_addr.S_un.S_un_b.s_b3) << "." << static_cast<int>(MyIPAddress.sin_addr.S_un.S_un_b.s_b4) << " on " << LocalHostName;
system("pause");
// close the WSA
WSACleanup();