TThread, Access volation

[Mr_ViK]

Собственно сразу к коду...

unit Unit1;

interface

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

type
TmyThread = class(TThread)
protected
procedure Execute; override;
procedure Test;
end;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
  private
    PT:TmyThread;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
procedure TmyThread.Execute;
begin
Synchronize(Test);
end;

procedure TmyThread.Test;
begin
ShowMessage('blaablaa');
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
PT.Create(false);
end;

procedure TForm1.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
begin
PT.Free;
end;

end.

Ошибка Aсcess volation... Подскажите

[Mr_ViK]

PT.Create(false);

заменил на

PT:=TmyThread.Create(false);

работает.