[villipuk]

Доброго дня!
Надеюсь на помощь....
Есть такой код:

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    GroupBox1: TGroupBox;
    Button5: TButton;
    Panel2: TPanel;
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Label4: TLabel;
    Label5: TLabel;
    Label6: TLabel;
    Label7: TLabel;
    Label8: TLabel;
    procedure FormResize(Sender: TObject);
    procedure FormShow(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  w,h:integer;
implementation

{$R *.dfm}

procedure TForm1.FormResize(Sender: TObject);
var prw,prh:real;i:integer;
begin
prw:=form1.Width/w;
prh:=form1.height/h;
for i:=0 to form1.ComponentCount-1 do
if (components[i] is tbutton) and (components[i] is tlabel) and (components[i] is TGroupBox) and (components[i] is tpanel) then
begin
(components[i] as tbutton).Left:=round((components[i] as tbutton).Left*prw);
(components[i] as tbutton).top:=round((components[i] as tbutton).top*prh);
(components[i] as tbutton).width:=round((components[i] as tbutton).width*prw);
(components[i] as tbutton).height:=round((components[i] as tbutton).height*prh);
(components[i] as tlabel).Left:=round((components[i] as tlabel).Left*prw);
(components[i] as tlabel).top:=round((components[i] as tlabel).top*prh);
(components[i] as tlabel).width:=round((components[i] as tlabel).width*prw);
(components[i] as tlabel).height:=round((components[i] as tlabel).height*prh);
(components[i] as tpanel).Left:=round((components[i] as tlabel).Left*prw);
(components[i] as tpanel).top:=round((components[i] as tlabel).top*prh);
(components[i] as tpanel).width:=round((components[i] as tlabel).width*prw);
(components[i] as tpanel).height:=round((components[i] as tlabel).height*prh);
(components[i] as TGroupBox).Left:=round((components[i] as TGroupBox).Left*prw);
(components[i] as TGroupBox).top:=round((components[i] as TGroupBox).top*prh);
(components[i] as TGroupBox).width:=round((components[i] as TGroupBox).width*prw);
(components[i] as TGroupBox).height:=round((components[i] as TGroupBox).height*prh);
end;
w:=form1.Width;
h:=form1.Height;
end;

procedure TForm1.FormShow(Sender: TObject);
begin
w:=form1.Width;
h:=form1.Height;
end;

end.

Тут код для растягивания компонентов формы при изменении размеров программы...
Данный код не работает, но если его писать только для tbutton, то все работает хорошо.

Код:

if (components[i] is tbutton) then
begin
(components[i] as tbutton).Left:=round((components[i] as tbutton).Left*prw);
(components[i] as tbutton).top:=round((components[i] as tbutton).top*prh);
(components[i] as tbutton).width:=round((components[i] as tbutton).width*prw);
(components[i] as tbutton).height:=round((components[i] as tbutton).height*prh);

Помогите разобраться с проблемой.
Необходимо чтобы все компоненты формы изменяли размер при изменении размера формы.

Просто не могу найти ошибку.