private void addStockToolStripMenuItem_Click(object sender, EventArgs e)
        {
            addstock jp = new addstock();

            jp.Show();
            this.Hide();
        }
        private void label1_Click(object sender, EventArgs e)
        {
            addstock jp = new addstock();

            jp.Show();
            this.Hide();
        }
        private void pictureBox2_Click(object sender, EventArgs e)
        {
            addstock jp = new addstock();

            jp.Show();
            this.Hide();
        }