unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, ComCtrls, StdCtrls, ImgList;

type
  TForm1 = class(TForm)
    Button1: TButton;
    Memo1: TMemo;
    OpenDialog1: TOpenDialog;
    SaveDialog1: TSaveDialog;
    FontDialog1: TFontDialog;
    ColorDialog1: TColorDialog;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    procedure Button4Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  nn:integer;
implementation
{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);  //ļ
begin
if OpenDialog1.Execute() then
begin
    Memo1.Clear;
    Memo1.Lines.LoadFromFile(OpenDialog1.FileName);
end;
end;

procedure TForm1.Button5Click(Sender: TObject);
begin
form1.Close
end;

procedure TForm1.Button2Click(Sender: TObject);  //ļ
begin
    SaveDialog1.Filter := 'Word files(*.doc)|*.doc|Txtfile(*.txt)|*.txt';
//ôù
    SaveDialog1.FilterIndex := 2;   //ĬʾļΪ*.txtļ
    if SaveDialog1.Execute() then
    begin
        Memo1.Lines.SaveToFile(SaveDialog1.FileName);
    end;
end;

procedure TForm1.Button3Click(Sender: TObject);   //
begin
    if FontDialog1.Execute() then
    begin
        Memo1.Font:=FontDialog1.Font;
    end;
end;

procedure TForm1.Button4Click(Sender: TObject); //ɫ
begin
    if ColorDialog1.Execute() then
    begin
        Memo1.Color := ColorDialog1.Color;   
    end;
end;
end. 