mainform.pas

控件,密码输入三次错误后,禁止输入,控件自动关闭

unit MainForm;

interface

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

type
  TLogin_main = class(TForm)
    gbPassword: TGroupBox;
    btnConfirm: TRzButton;
    pn1Hint: TPanel;
    edtPassword: TEdit;
    procedure btnConfirmClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Login_main: TLogin_main;

implementation

{$R *.dfm}

procedure TLogin_main.btnConfirmClick(Sender: TObject);
begin
  if LowerCase(Trim(edtPassword.Text))='123' then
  pn1Hint.Caption:='欢迎使用本系统'
  else begin
   edtPassword.Tag:=edtPassword.Tag -1;
   if edtPassword.Tag = 0 then begin
   pn1Hint.Caption :='';
   gbPassword.Enabled:=false;
   end
   else begin
   pn1Hint.Caption:='请重新输入密码';
   edtPassword.SelLength:=Length(edtPassword.Text);
   edtPassword.SetFocus;
   end;

end;

end;

end.