private void btnFind_Click(object sender, EventArgs e)
        {
            craft c = new craft();

            c.number = Convert.ToInt16(txtID.Text.ToString());

            c.findInInventory(c.number, main);

            this.Close();
        }
        private void btnAdd_Click(object sender, EventArgs e)
        {
            craft c = new craft();

            c.number      = Convert.ToInt16(txtID.Text.ToString());
            c.cost        = Convert.ToDouble(txtCost.Text.ToString());
            c.price       = Convert.ToDouble(txtPrice.Text.ToString());
            c.location    = txtLocation.Text.ToString();
            c.dateCreated = txtDate.Text.ToString();
            c.condition   = txtCondition.Text.ToString();

            c.addToInventory(main);

            this.Close();
        }