Delphi结构体数组指针的问题

//这段代码在Delphi 2007和delphi 7下是可以执行的，所以正确使用结构体数组和指针应该是这样的，已验证

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
type
   TMyType = record
     S: String;
     I: Integer;
    end;
   TMyArray = array of TMyType;
   PMyArray = ^TMyArray;

 var
   MyArray: PMyArray;
   i:integer;
    AList:TStrings;
begin
  try
    new(MyArray);
    AList:=TStringList.Create;
    SetLength(MyArray^, 50000);
    for i:=0 to 49999 do
    begin
      MyArray^[i].S :='中山'+inttostr(i);
      myArray^[i].I :=i;
      AList.Add(MyArray^[i].S+',年龄为：'+inttostr(MyArray^[i].I));
    end;
   self.Memo1.Lines:=Alist;
  finally
     SetLength(MyArray^, 0);
     Dispose(MyArray);
  end;

end;

end.

这段代码在Delphi 2007和delphi 7下是可以执行的，所以正确使用结构体数组和指针应该是这样的，已验证。