Add 10 Minutes To Time

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    stopLbl: TLabel;
    addLbl: TLabel;
    HasilLbl: TLabel;
    Timer1: TTimer;
    Timer2: TTimer;
    procedure Timer1Timer(Sender: TObject);
    procedure Timer2Timer(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  add,stop,decrease :TDateTime;

implementation

{$R *.dfm}

procedure TForm1.Timer1Timer(Sender: TObject);
begin
 Stop := Now;
 stopLbl.Caption := formatdatetime('hh:nn:ss',Stop);
 add :=  Now + ((1/24/60)*10);
 addLbl.Caption := FormatDateTime('hh:nn:ss',add);
 timer1.Enabled:=false;
end;

procedure TForm1.Timer2Timer(Sender: TObject);
begin
Decrease := add-now;
HasilLbl.Caption := formatdatetime('hh:nn:ss',Decrease);
end;

end.

And the Result will be like the picture  below (HasilLbl will be decreased)

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