private void btnSideBar3_Click(object sender, EventArgs e)
        {
            LogBUL     logBUL     = new LogBUL();
            StockBUL   stockBUL   = new StockBUL();
            AccountBUL accountBUL = new AccountBUL();

            string created_at = DateTime.Now.ToString();

            logBUL.StoreLog(1, this.accountNo, created_at, 550, 4, "Vấn tin số dư");
            int money = accountBUL.GetAccount(this.accountNo).Balance - 550;

            stockBUL.UpdateMoney(money, this.accountNo);


            (new Confirmation(this.rm, this.card, this.accountNo)).Show();
            this.Hide();
            myTimer.Tick    += new EventHandler(TimerEventProcessor);
            myTimer.Interval = 2000;
            myTimer.Start();
        }