private void cmdRemove_Click(object sender, EventArgs e)
        {
            DialogResult reply = MessageBox.Show("Do you want Delete?", "Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question);

            if (reply == DialogResult.Yes)
            {
                m_oRegister.DeleteRegistration(m_lRegisterId);
                m_lRegisterId = 0;
                SetDefault();
            }
        }