Membuat Program Menghitung Umur Dengan Delphi

Source Code :

unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ExtCtrls, TeeProcs, TeEngine, Chart, Buttons, ComCtrls,
  StdCtrls, XPMan;
type
  TForm1 = class(TForm)
    Chart1: TChart;
    XPManifest1: TXPManifest;
    GroupBox1: TGroupBox;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Edit1: TEdit;
    Edit2: TEdit;
    DateTimePicker1: TDateTimePicker;
    SpeedButton1: TSpeedButton;
    GroupBox2: TGroupBox;
    Memo1: TMemo;
    Label4: TLabel;
    procedure SpeedButton1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;
var
  Form1: TForm1;
implementation
uses DateUtils;
{$R *.dfm}
procedure TForm1.SpeedButton1Click(Sender: TObject);
Var
  Nama,Alamat : String;
  ThS,ThL,Umur: Integer;
begin
  Nama := (Edit1.Text);
  Alamat := (Edit2.Text);
  ThS :=YearOf(now);
  ThL :=YearOf(DateTimePicker1.Date);
  Umur:=(ThS-ThL);
  memo1.Lines.Add(' Hallo ' + (Nama));
  memo1.Lines.Add(' Anda tinggal di ' + (Alamat));
  memo1.Lines.Add(' Saat ini anda berumur ' +  IntToStr(Umur)+ ' Tahun');
end;
end.
//Asli Buatan I Nyoman Widhi Adnyana ||| 09101012