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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient,
  IdExplicitTLSClientServerBase, IdFTP;

type
  TForm1 = class(TForm)
    IdFTP1: TIdFTP;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    procedure Button4Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation
var log: textfile;
    beispiel: string;
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
IdFTP1.Connect;
IdFTP1.ChangeDir('dirname');
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
IdFTP1.Quit;
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
beispiel := 'Es klappt!';
assignfile(log, 'data.dat');
rewrite(log);
writeln(log, beispiel+' Endlich!');
closefile(log);
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
IdFTP1.Put('data.dat');
end;

end.