login.pas

文件加密发生法

unit Login;

interface

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

type
  Tfrm_Login = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    Button2: TButton;
    Label1: TLabel;
    procedure FormCreate(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure Button1Click(Sender: TObject);
  private
    PassTime:Byte;
    { Private declarations }
  public
    { Public declarations }
  end;

const
  Err_Pass='密码错误，还有%d次机会！';

var
  frm_Login: Tfrm_Login;

implementation

{$R *.DFM}

uses Func;

procedure Tfrm_Login.FormCreate(Sender: TObject);
begin
  PassTime:=1;
end;

procedure Tfrm_Login.Button2Click(Sender: TObject);
begin
  if GetPassWord=Edit1.Text then
  begin
    Close;
  end else
  begin
    inc(PassTime);
    if PassTime>3 then Halt;
//    MessageBox(Handle,PChar(Format(Err_Pass,[4-PassTime])),'警告',MB_OK);
    ShowMessage(Format(Err_Pass,[4-PassTime]));
  end;
end;

procedure Tfrm_Login.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  Action:=caFree;
end;

procedure Tfrm_Login.Button1Click(Sender: TObject);
begin
  Halt;
end;

end.