/// <summary>
        /// Enter key and backspace  navigation and calls frmLedgerPopup to create new Ledger
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void cmbCashOrBank_KeyDown(object sender, KeyEventArgs e)
        {
            try
            {
                if (e.KeyCode == Keys.Enter)
                {

                    if (txtCheckNo.Enabled == true)
                    {
                        txtCheckNo.Focus();
                    }
                    else
                    {
                        txtNarration.Focus();
                    }
                }
                if (e.KeyCode == Keys.Back)
                {
                    dtpSalaryMonth.Focus();
                }
                if (e.KeyCode == Keys.F && Control.ModifierKeys == Keys.Control) //Pop Up
                {
                    if (cmbCashOrBank.SelectedIndex != -1)
                    {
                        frmLedgerPopupObj = new frmLedgerPopup();
                        frmLedgerPopupObj.MdiParent = formMDI.MDIObj;
                        frmLedgerPopupObj.CallFromAdvancePayment(this, Convert.ToDecimal(cmbCashOrBank.SelectedValue.ToString()), "CashOrBank");
                    }
                    else
                    {
                        Messages.InformationMessage("Select any cash or bank account");
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("AP42:" + ex.Message, "OpenMiracle", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }