implementation
uses DateUtils;
var
CampoHora : TTime;
procedure TForm1.FormCreate(Sender: TObject);
begin
CampoHora := Time;
Label1.Caption := FormatDateTime('hh:mm:ss', CampoHora);
Timer1.Interval := 1000;
Timer1.Enabled := True;
end;
procedure TForm1.Timer1Timer(Sender: TObject);
begin
CampoHora := IncSecond(CampoHora);
Label1.Caption := FormatDateTime('hh:mm:ss', CampoHora);
end;