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uses IWshRuntimeLibrary_TLB;
var  sh    : IWshShell3;

procedure TForm1.FormCreate(Sender: TObject);
begin
  SH := CoWshShell.Create;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
var
  Prog  : IWshExec;
begin
  Prog  := sh.Exec('netsh wlan show interfaces');
  Memo1.Clear;
  Memo1.Lines.add(Prog.StdOut.ReadAll);
  if (Memo1.Lines[19][29] = '%') then
    begin
        Prog  := sh.Exec('');
        Prog.StdOut.ReadAll;
    end;
end;					

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var
  LogIn : TDosCommand;
  WLan  : TDosCommand;

procedure TForm1.Button1Click(Sender: TObject);
begin
  WLan.CommandLine := 'ping 127.0.0.1';
  WLan.Execute;
end;

procedure TForm1.OnNewLine(Sender: TObject; NewLine: string; OutputType: TOutputType);
begin
  Form1.Memo1.Lines.Add(NewLine);
end;


procedure TForm1.FormCreate(Sender: TObject);
begin
  WLan := TDosCommand.Create(self);
  LogIn:= TDosCommand.Create(self);
  WLan.OnNewLine := OnNewLine;
end;