[[seoane]]

Prueba utilizando WinInet:

Código Delphi [-]
Uses WinInet;

function Download(LocalFile, RemoteFile, Server: string; Port: Word;
  Username, Password: PChar): Boolean;
var
  hNet: HINTERNET;
  hCon: HINTERNET;
  Context: DWORD;
begin
  Result := FALSE;
  Context:= 0;
  hNet := InternetOpen('agent', INTERNET_OPEN_TYPE_PRECONFIG, nil, nil, 0);
  if (hNet <> nil) then
  begin
    hCon:= InternetConnect(hNet,PChar(Server),Port,Username,Password,
      INTERNET_SERVICE_FTP,0,Context);
    if (hCon <> nil) then
    begin
      Result:= FtpGetFile(hCon,PChar(RemoteFile),PChar(LocalFile),FALSE,
        FILE_ATTRIBUTE_NORMAL, FTP_TRANSFER_TYPE_BINARY, Context);
      InternetCloseHandle(hCon);
    end;
    InternetCloseHandle(hNet);
  end;
end;


// Por ejemplo
Download('c:\1.txt','/Carpeta/1.txt','192.168.1.33',21,'Usuario','Password');