private void txtBarcode_TextChanged(object sender, EventArgs e)
        {
            ClearBoxes();


            BL.CLS_ORDERS clsPro = new BL.CLS_ORDERS();


            DataTable dt = new DataTable();

            dt = clsPro.SEARCH_BARCODE(txtBarcode.Text);
            if (dt.Rows.Count > 0)
            {
                txtProductID.Text = dt.Rows[0][0].ToString();

                txtProductName.Text = dt.Rows[0][1].ToString();

                txtProductPrice.Text = dt.Rows[0][2].ToString();

                // txt_ID.SelectionStart = 0;
                //  txt_ID.SelectLenth = txt_ID.textLenth;
            }
        }