private void lstProducts_SelectedIndexChanged(object sender, EventArgs e)
        {
        //---start with 1 item and clear the previous sale
        txtQuantity.Text = "1";
        lblTax.Text = "";
        lblTotal.Text = "";

        
        //---make sure you understand what I am doing here in this section
        
        string itemChosen = lstProducts.Text.Substring(0,10).Trim();
        string itemPrice = lstProducts.Text.Substring(20,15).Trim();
        string itemPhoto = lstProducts.Text.Substring(40).Trim();

        
        txtItem.Text = itemChosen;
        txtPrice.Text = itemPrice;
        picThumbs.Image = System.Drawing.Image.FromFile("..\\..\\images\\" + itemPhoto);

        }