[Snik11]

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
  ms : Int64;
begin
  ms := MilliSecondsBetween(Now() - EncodeDateTime(1970,1,1,0,0,0,0));
memo1.Text:=inttostr(ms);
end;
end.

ошибка выходит на ms := MilliSecondsBetween(Now() - EncodeDateTime(1970,1,1,0,0,0,0));


Может кто-нибудь подсказать, что я делаю не так?