private void exit_b_Click(object sender, System.EventArgs e)
        {
            inputPanel1.Enabled = false;
            cn.Close();
            Form71 frm71 = new Form71();

            frm71.Show();
            this.Close();
        }
        private void button1_Click(object sender, System.EventArgs e)
        {
            Form71 frm71 = new Form71();

            frm71.Show();
        }