System Delphi

unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
var
MyTime : TSystemTime;
begin
FillChar (MyTime, sizeof(MyTime), #0);
MyTime.wYear := 2004;
MyTime.wMonth := 5;
MyTime.wDay := 11;
if not SetSystemTime (MyTime) then
ShowMessage ('Failed to set system time!');
end;
end.