/// <summary>
        /// TO get the Due days 
        /// </summary>
        public void DueDays()
        {
            try
            {
                PurchaseOrderBll BllPurchaseOrder = new PurchaseOrderBll();
                txtDueDays.Text = BllPurchaseOrder.DueDays(dtpDate.Value, dtpDueDate.Value).ToString();

            }
            catch (Exception ex)
            {
                MessageBox.Show("PO18:" + ex.Message, "OpenMiracle", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }