type 
  TForm1 = class(TForm) 
  private 
   { Private declarations } 
   procedure WMTIMECHANGE(var Message: TWMTIMECHANGE); 
       message WM_TIMECHANGE; 
  public 
   { Public declarations } 
  end; 
 
var 
  Form1: TForm1; 
 
implementation 
 
{$R *.DFM} 
 
procedure TForm1.WMTIMECHANGE(var Message: TWMTIMECHANGE); 
begin 
  Form1.Caption := 'Time Changed'; 
end;