private void btn_Back_Click(object sender, EventArgs e)
        {
            FrmRegisteredUserDetails frm = new FrmRegisteredUserDetails();

            this.Hide();
            frm.Show();
        }
        private void btnGetDetails_Click(object sender, EventArgs e)
        {
            FrmRegisteredUserDetails frm = new FrmRegisteredUserDetails();

            frm.MdiParent = this.MdiParent;
            this.Hide();
            frm.Show();
        }