unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Edit1: TEdit;
    Panel1: TPanel;
    CheckBox1: TCheckBox;
    Button5: TButton;
    Button6: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
if form1.CheckBox1.Checked then Form1.Edit1.Text:= Form1.Edit1.Text+'1'
                           else Form1.Panel1.Caption:= Form1.panel1.Caption+'1'
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
if form1.CheckBox1.Checked then Form1.Edit1.Text:= Form1.Edit1.Text+'2'
                           else Form1.Panel1.Caption:= Form1.panel1.Caption+'2'
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
if form1.CheckBox1.Checked then Form1.Edit1.Text:= Form1.Edit1.Text+'3'
                           else Form1.Panel1.Caption:= Form1.panel1.Caption+'3'
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
if form1.CheckBox1.Checked then Form1.Edit1.Text:= Form1.Edit1.Text+'4'
                           else Form1.Panel1.Caption:= Form1.panel1.Caption+'4'
end;

procedure TForm1.Button5Click(Sender: TObject);
begin
  Form1.Edit1.Text:='';
  Form1.Panel1.Caption:='';
end;

procedure TForm1.Button6Click(Sender: TObject);
begin
close();
end;

end.