/// <summary>
 /// For enter key, backspace navigation and create new ledger from here
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void cmbCashOrParty_KeyDown(object sender, KeyEventArgs e)
 {
     try
     {
         if (e.KeyCode == Keys.Enter)
         {
             if (txtDueDate.Enabled)
             {
                 txtDueDate.Focus();
                 txtDueDate.SelectionStart = 0;
                 txtDueDate.SelectionLength = 0;
             }
         }
         if (e.KeyCode == Keys.Back)
         {
             if (txtDate.Enabled)
             {
                 txtDate.Focus();
                 txtDate.SelectionLength = 0;
                 txtDate.SelectionStart = 0;
             }
         }
         if (e.KeyCode == Keys.F && Control.ModifierKeys == Keys.Control) //Pop Up
         {
             if (cmbCashOrParty.SelectedIndex != -1)
             {
                 frmLedgerPopup frmLedgerPopupObj = new frmLedgerPopup();
                 frmLedgerPopupObj.MdiParent = formMDI.MDIObj;
                 frmLedgerPopupObj.CallFromPurchaseOrder(this, Convert.ToDecimal(cmbCashOrParty.SelectedValue.ToString()), "CashOrSundryCreditors");
             }
             else
             {
                 Messages.InformationMessage("Select any cash or party");
             }
         }
         if (e.KeyCode == Keys.C && Control.ModifierKeys == Keys.Alt)//new ledger add
         {
             btnCashOrPartyAdd_Click(sender, e);
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("PO64:" + ex.Message, "OpenMiracle", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
 }