unit4.pas

某单位需要完成N项任务

unit Unit4;

interface

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

type
  TForm4 = class(TForm)
    MainMenu1: TMainMenu;
    N1: TMenuItem;
    Image1: TImage;
    Label1: TLabel;
    Label2: TLabel;
    N2: TMenuItem;
    N3: TMenuItem;
    N4: TMenuItem;
    procedure N2Click(Sender: TObject);
    procedure N1Click(Sender: TObject);
    procedure N3Click(Sender: TObject);
    procedure N4Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form4: TForm4;

implementation

uses Unit1, Unit3;

{$R *.dfm}

procedure TForm4.N2Click(Sender: TObject);
begin
 form3:=tform3.create(nil);
 form3.show;
 form4.Hide;
end;

procedure TForm4.N1Click(Sender: TObject);
begin
 form1:=Tform1.create(nil);
 form1.show;
 form4.Hide;
end;

procedure TForm4.N3Click(Sender: TObject);
begin
  showmessage('慢慢玩！很简单，一定会用的。');
end;

procedure TForm4.N4Click(Sender: TObject);
begin
  form4.close;
end;

procedure TForm4.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  form4.Release;
end;

end.