How to connect to an other computer at a given port, t.ex. to read a HTML-page

How to connect to an other computer:

// Connect to a server at a given port

#ifdef _WIN32
  #include <winsock2.h>
  #pragma comment (lib, "ws2_32.lib")
#else
  #include <socket.h>
#endif // _WIN32

#include <iostream> // Output

main( int argc, char *argv[ ], char *envp[ ] )
{
  if (argc < 2 || argc > 3)
  {
    std::cout << "Usage: " << argv[0] << " Server [ port ] " << std::endl;
    return (0);
  }

#ifdef _WIN32 // Only nessesary under Windows

  WSADATA wsockinfo;

  int retval = WSAStartup(MAKEWORD(1, 1), &wsockinfo);

  if (retval != 0)
  {
    std::cout << "Unable to initialize Winsock! --" << retval << std::endl;
  }
  else
  {
#endif // _WIN32

    // Get information about the server to connect to.
    hostent *pHostinfo = gethostbyname(argv[1]);

    if (pHostinfo == NULL)
    {
      std::cout << "Unable to resolve host " << argv[1] << std::endl;
    }
    else
    {
      // Copy information about the server into the structure.
      if (pHostinfo->h_addrtype != AF_INET)
      {
        std::cout << "Couldn't get IP address of " << argv[1] << std::endl;
      }
      else
      {
        // Create a socket.
        SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);

        if (sock == SOCKET_ERROR)
        {
          std::cout << "Unable to create socket!" << std::endl;
        }
        else
        {
          // Make a connection to server
          sockaddr_in sockinfo;
          memset(&sockinfo, 0, sizeof(sockinfo));

          sockinfo.sin_family = AF_INET; // Internet

          int port = 7;  // echo
          if (argc == 3) // A special port was given
          {
            port = atoi(argv[2]);

            if (port == 0)
            {
              servent *pEnt = getservbyname(argv[2], "tcp");
              if (pEnt)
                port = ntohs(pEnt->s_port);
            }
          }

          sockinfo.sin_port = htons(port);

          // Connect to this IP address.
          memcpy(&sockinfo.sin_addr, pHostinfo->h_addr, 4);

          std::cout << "Attempting to connect to "
                    << int(sockinfo.sin_addr.S_un.S_un_b.s_b1) << "."
                    << int(sockinfo.sin_addr.S_un.S_un_b.s_b2) << "."
                    << int(sockinfo.sin_addr.S_un.S_un_b.s_b3) << "."
                    << int(sockinfo.sin_addr.S_un.S_un_b.s_b4)
                    << " on port " << port << "  ...." ;

          retval = connect(sock, (sockaddr *) &sockinfo, sizeof(sockinfo));

          if (retval != 0)
          {
            std::cout << "Unable to connect!" << std::endl;
          }
          else
          {
            std::cout << "connected" << std::endl;
          }

          closesocket(sock);
        }
      }
    }

#ifdef _WIN32
    WSACleanup();
  }
#endif // _WIN32

  return 0;
}