private void txtPinNum_TextChanged(object sender, EventArgs e) { if (txtPinNum.Text.Length == 4) { pin = int.Parse(txtPinNum.Text); ChangePinNumberBLL pinBLL = new ChangePinNumberBLL(); bool customerStatus = pinBLL.validatePin(pin, acNo); if (customerStatus) { //atm button enable btnBalance.Enabled = btnWithdraw.Enabled = btnWithdrawReceipt.Enabled = true; panMoney.Controls.Clear(); txtAccountNo.Enabled = txtPinNum.Enabled = false; Label lblIntro = new Label(); lblIntro.Name = "lblIntro"; lblIntro.Text = "Please \n\nselect \n\nan \n\naction !!!"; lblIntro.Location = new Point(70, 55); lblIntro.AutoSize = true; lblIntro.Font = new Font("Georgia", 16F); panMoney.Controls.Add(lblIntro); } else { MessageBox.Show("Please enter correct information !!!"); txtAccountNo.Text = txtPinNum.Text = ""; txtAccountNo.Enabled = true; txtPinNum.Enabled = false; txtAccountNo.Focus(); return; } } }