如何更新monthcalendar控件的当前日期？

Question

type
  TForm1 = class(TForm)
    MonthCalendar1: TMonthCalendar;
  private
    { Private declarations }
    procedure WMTIMECHANGE(var Msg: TWMTimeChange); message WM_TIMECHANGE;
  public
    { Public declarations }
  end;var
  Form1: TForm1;implementation{$R *.dfm}uses CommCtrl;procedure TForm1.WMTIMECHANGE(var Msg: TWMTimeChange);
var
  ST: TSystemTime;
begin
  DateTimeToSystemTime(Date, ST);
  MonthCal_SetToday(MonthCalendar1.Handle, ST);
end;