[yurfed]

ziiiro, забирай пример.

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    lbl1: TLabel;
    chk1: TCheckBox;
    procedure chk1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.chk1Click(Sender: TObject);
begin

if chk1.Checked
    then
    lbl1.Visible:=True   //Чекбокс отмечен
    else
    lbl1.Visible:=False;  //Чекбокс пустой

end;

end.