[Source]

Сообщение от NumLock

Код:

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure ButtonClick(Sender: TObject);
  end;

procedure TForm1.ButtonClick(Sender: TObject);
begin
  ShowMessage(TButton(Sender).Name);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  with TButton.Create(Self) do
  begin
    Parent:=Self;
    Caption:='Дженсон Кнопка';
    Left:=10;
    Top:=10;
    Width:=100;
    Name:='JensonButton';
    OnClick:=ButtonClick;
  end;
end;

end.

[Error] Unit2.pas(129): Undeclared identifier: 'ButtonClick'