[NumLock]

Код:

unit Unit1;

interface

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

type
  TCmbMetters = class(TComboBox)
  end;

  TForm1 = class(TForm)
    Label1: TLabel;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
    CmbMetters: TCmbMetters;
    procedure NumLock(Sender: TObject);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TForm1 }

procedure TForm1.NumLock(Sender: TObject);
begin
  Label1.Caption:=CmbMetters.Text;  
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  CmbMetters:=TCmbMetters.Create(Self);
  CmbMetters.Parent:=Self;
  CmbMetters.OnClick:=NumLock;
  CmbMetters.Items.Add('1');
  CmbMetters.Items.Add('2');
  CmbMetters.Items.Add('3');
end;

end.