unit Unit1;

{$mode objfpc}{$H+}

interface

uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,shellapi;

type

  { TForm1 }

  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Open: TOpenDialog;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.lfm}

{ TForm1 }

procedure TForm1.Button1Click(Sender: TObject);
begin
  open.Filter:='Archivos .rar|*.rar';
  if Open.Execute then
    edit1.Text:=Open.FileName;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
   open.Filter:='Archivos .jpg|*.jpg';
   if Open.Execute then
    edit2.Text:=Open.FileName;

end;

procedure TForm1.Button3Click(Sender: TObject);
begin
 ShellExecute(form1.Handle,'open',PChar(GetEnvironmentVariable('ComSpec')), pchar('/k copy /b '+ExtractFileName(edit2.Text)+' + '+ExtractFileName(edit1.Text)+' Secreto.jpg'),nil,1);

end;

end.