Project Structure

• TextProp.dpr
• TextPF.pas
• TextPF.dfm

program TextProp;

uses
  Forms,
  TextPF in 'TextPF.pas' {Form1};

{$R *.RES}

begin
  Application.Initialize;
  Application.CreateForm(TForm1, Form1);
  Application.Run;
end.

unit TextPF;

interface

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

type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    CheckBox1: TCheckBox;
    Label1: TLabel;
    Memo1: TMemo;
    ListBox1: TListBox;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

type
  TControlHack = class (TControl);

procedure TForm1.Button1Click(Sender: TObject);
var
  I: Integer;
begin
  for I := 0 to ControlCount - 1 do
    TControlHack (Controls [I]).Text :=
      TControlHack (Controls [I]).Text + '*';
end;

end.

object Form1: TForm1
  Left = 200
  Top = 108
  Width = 434
  Height = 219
  Caption = 'TextProp'
  Font.Charset = DEFAULT_CHARSET
  Font.Color = clWindowText
  Font.Height = -11
  Font.Name = 'MS Sans Serif'
  Font.Style = []
  PixelsPerInch = 96
  TextHeight = 13
  object Label1: TLabel
    Left = 168
    Top = 144
    Width = 32
    Height = 13
    Caption = 'Label1'
  end
  object Edit1: TEdit
    Left = 152
    Top = 76
    Width = 121
    Height = 21
    TabOrder = 0
    Text = 'Edit1'
  end
  object Button1: TButton
    Left = 152
    Top = 32
    Width = 121
    Height = 25
    Caption = 'Change Text'
    TabOrder = 1
    OnClick = Button1Click
  end
  object CheckBox1: TCheckBox
    Left = 152
    Top = 112
    Width = 121
    Height = 17
    Caption = 'CheckBox1'
    TabOrder = 2
  end
  object Memo1: TMemo
    Left = 280
    Top = 32
    Width = 137
    Height = 137
    Lines.Strings = (
      'Memo1')
    TabOrder = 3
  end
  object ListBox1: TListBox
    Left = 8
    Top = 32
    Width = 137
    Height = 137
    ItemHeight = 13
    Items.Strings = (
      'Item 1'
      'Item 2'
      'Item 3')
    TabOrder = 4
  end
end