basic

procedure TForm1.Button1Click(Sender: TObject);
var
  CMD1: String;
  username,password,host: string;
begin
  username:=Edit1.Text;
  password:=Edit2.Text;
  host:=Edit3.Text;
  CMD1:=extractfilepath(application.exename)+'Plink.exe -v -N -C -D 1080 ' +username+ '@' +host+ ' -P 22 -pw ' +password;
  DosCommand1.CommandLine:=CMD1;
  DosCommand1.OutputLines :=Memo1.Lines;
  DosCommand1.Execute;
end;