private void frmOPDetails_Load(object sender, EventArgs e)
        {
            OrderOfPayment OP = new OrderOfPayment();
            Dictionary<string,string> data = OP.getOPDataWOOR(OPNo);

            mtOPNo.Text = "" + OPNo;
            mtPayor.Text = data["Payor"];
            mtTotal.Text = data["Amount"];
            mtDateIssued.Text = data["DateIssued"];
            mtPaid.Text = OP.getPaymentStatus();
            mtOPType.Text = OP.getOPType();
            this.ControlBox = true;

            string[][] particulars =  OP.getOrderOfPaymentItem(OPNo);
            new clsDB().Con().listViewTransferData(particulars, listView1);
        }