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unit Unit1;

interface

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

type
  pint= ^Integer;

  tc = class
  public
    p: pint;
  end;

  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private-Deklarationen }
    p,p2: Pint;
    i: integer;
    op: tc;
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
begin
  i := 333;
  p := @i;
  caption := inttostr(p^);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  new(p2);
  p2^:=4;
  caption:=inttostr(p2^);
  dispose(p2);
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  new(op.p);
  (op.p)^:= 1234;
  caption := inttostr((op.p)^);
  dispose(op.p);
end;

end.                    

1:

op := Tc.Create;