unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}
var
ed:tedit;

procedure TForm1.FormCreate(Sender: TObject);
begin
button1.Caption:='创建';
button2.Caption:='保存';
button3.Caption:='载入';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
//创建一个edit
ed:=tedit.Create(self);
  ed.Height:=20;
  ed.Width:=150;
  ed.Top:=50;
  ed.Left:=70;
  ed.Parent:=form1;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  stream:tstream;
begin
//保存在一个文件内
stream:=tfilestream.Create('123.bb',fmcreate);
  try
    stream.WriteComponent(ed);
  finally
    stream.Free;
  end;
end;

procedure TForm1.Button3Click(Sender: TObject);
var
  stream:tstream;
begin
//从文件内导入
  stream:=tfilestream.Create('123.bb',fmopenread);
  try
    ed:=tedit(stream.ReadComponent(nil));
    ed.Parent:=form1;

  finally
    stream.Free;
  end;
end;
begin
  registerclass(tedit);
end.