Record aus stream auslesen

[Spurius]

Hallo,
wie kann ich in folgendem Code das Record 'Test2' mit den Daten aus dem Stream füllen?

Delphi-Quellcode:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    procedure Button1Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button2Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;
 TTest=record
  a,b,c: String;
 end;
var
  Form1: TForm1;
  Test: TTest;
  TestStream: TMemoryStream;
implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
 Test.a := 'a';
 Test.b := 'b';
 Test.c := 'c';
 TestStream := TMemoryStream.Create;
 TestStream.Write(Test,sizeof(Test));
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
 TestStream.Free;
end;

procedure TForm1.Button2Click(Sender: TObject);
Var Test2: TTest;
begin
  //Was muss ich hier schreiben, um das ecord Test2 mit Daten zu füllen?
end;

end.

Gruß
Spurius