/// <summary>
 /// For enter key and backspace navigation 
 /// Alt+c for new ledger creation
 /// ctrl+f for ledger popup
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void cmbCashOrParty_KeyDown(object sender, KeyEventArgs e)
 {
     try
     {
         dgvProduct.ClearSelection();
         if (e.KeyCode == Keys.Enter)
         {
             if (cmbcurrency.Enabled)
             {
                 cmbcurrency.Focus();
             }
             else
             {
                 cmbVoucherType.Focus();
             }
         }
         if (e.KeyCode == Keys.Back)
         {
             if (txtDate.Enabled)
             {
                 txtDate.Focus();
                 txtDate.SelectionLength = 0;
                 txtDate.SelectionStart = 0;
             }
         }
         if (e.KeyCode == Keys.C && Control.ModifierKeys == Keys.Alt)
         {
             SendKeys.Send("{F10}");
             btnNewLedger_Click(sender, e);
         }
         if (e.KeyCode == Keys.F && Control.ModifierKeys == Keys.Control) //Pop Up
         {
             if (cmbCashOrParty.Focused)
             {
                 cmbCashOrParty.DropDownStyle = ComboBoxStyle.DropDown;
             }
             else
             {
                 cmbCashOrParty.DropDownStyle = ComboBoxStyle.DropDownList;
             }
             if (cmbCashOrParty.SelectedIndex != -1)
             {
                 frmLedgerPopup frmLedgerPopupObj = new frmLedgerPopup();
                 frmLedgerPopupObj.MdiParent = formMDI.MDIObj;
                 frmLedgerPopupObj.CallFromMaterialReceipt(this, Convert.ToDecimal(cmbCashOrParty.SelectedValue.ToString()), "CashOrSundryCreditors");
             }
             else
             {
                 Messages.InformationMessage("Select any cash or party");
             }
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show("MR75:" + ex.Message, "OpenMiracle", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
 }