ulogin.pas

用delphi编写的登录窗体

unit ULogin;

interface

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

type
  TfrmLogin = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    edtUserName: TEdit;
    edtPassword: TEdit;
    btnLogin: TButton;
    btnExit: TButton;
    procedure btnLoginClick(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure btnExitClick(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmLogin: TfrmLogin;
  Log:Boolean;

implementation

{$R *.dfm}

procedure TfrmLogin.btnLoginClick(Sender: TObject);
begin
  if Log=False then
  begin
    if(edtUserName.Text='Tom')and(edtPassword.Text='123')then
    begin
      Close;
      Log:=True;
      end
    else
      ShowMessage('Error User');
      end;
end;

procedure TfrmLogin.FormCreate(Sender: TObject);
begin
   Log:=False;
end;

procedure TfrmLogin.btnExitClick(Sender: TObject);
begin
  Close;
end;

procedure TfrmLogin.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  if Log=False then
    Application.Terminate;
end;

end.