有i个相同控件，如何指定到第i个

{******************************************************}
{    Desined for 有i个相同控件，如何指定到第i个。      }
{    copyright (c) 2003-2004 reserved                  }
{    Mail to [e-mail] with any question}
{******************************************************}
unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Edit4: TEdit;
    Edit5: TEdit;
    Edit6: TEdit;
    Edit7: TEdit;
    Edit8: TEdit;
    Edit9: TEdit;
    Edit10: TEdit;
    Button1: TButton;
    Edit11: TEdit;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
i,j,num:integer;
begin
 if edit11.text<>'' then //edit11 is you input num
 begin
 num:=strtoint(edit11.Text);
 j:=0;
 for i:=0 to ComponentCount-1 do
  begin
  j:=j+1;
  if j=num then
  tedit(form1.Components[j-1]).Text:='ok';
  end;
 end;
end;
end.