ftp x++

str ftpHostName = 'ftp.microsoft.com'; // without "ftp://", only name
str username    = 'myloginname';
str password    = 'mypassword';
str oldname     = 'oldfilename';
str newname     = 'newfilename';

System.Net.Sockets.Socket socket;
System.Net.Dns dns;
System.Net.IPHostEntry  hostEntry;
System.Net.IPAddress[] addresses;
System.Net.IPAddress    address;
System.Net.IPEndPoint endPoint;

void sendCommand(str _command)
{
    System.Text.Encoding ascii;
    System.Byte[] bytes;
    ;

    ascii = System.Text.Encoding::get_ASCII();
    bytes = ascii.GetBytes(_command + '\r\n');
    socket.Send(bytes, bytes.get_Length(), System.Net.Sockets.SocketFlags::None);
}
;

socket = new System.Net.Sockets.Socket(System.Net.Sockets.AddressFamily::InterNetwork, System.Net.Sockets.SocketType::Stream, System.Net.Sockets.ProtocolType::Tcp);
hostEntry = System.Net.Dns::GetHostEntry(ftpHostName);

addresses = hostEntry.get_AddressList();
address = addresses.GetValue(0);

info(address.ToString());

endPoint = new System.Net.IPEndPoint(address, 21);
socket.Connect(endPoint);

sendCommand(strfmt("USER %1", username));
sendCommand(strfmt("PASS %1", password));
sendCommand(strfmt("RNFR %1", oldname));
sendCommand(strfmt("RNTO %1", newname));