private void button3_Click(object sender, EventArgs e)
        {
            edit ed = new edit(this);

            ed.Hide();
            update u = new update();

            u.Show();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            edit ed = new edit(this);

            ed.Hide();
            new_employee emp = new new_employee();

            emp.Show();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            edit ed = new edit(this);

            ed.Hide();
            delete d = new delete();

            d.Show();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            Form edit = new edit(this);

            edit.TopLevel   = false;
            edit.AutoScroll = true;
            this.flowLayoutPanel2.Controls.Add(edit);
            edit.Show();
        }