private void btnAdd_Click(object sender, EventArgs e)
        {
            string _Qty = "";

            foreach (DataRow _dr in loInventoryType.getInventoryType(cboType.SelectedValue.ToString()).Rows)
            {
                _Qty = _dr["Qty"].ToString();
            }
            StockAdjustmentItemDetailUI loStockAdjustmentItemDetail = new StockAdjustmentItemDetailUI(_Qty);

            loStockAdjustmentItemDetail.ParentList = this;
            loStockAdjustmentItemDetail.ShowDialog();
        }