private void deleteAllButton_Click(object sender, EventArgs e)
        {
            Cursor.Current = Cursors.WaitCursor;

            int result = BSSDK.BS_DeleteAllUser(m_Handle);

            Cursor.Current = Cursors.Default;

            if (result != BSSDK.BS_SUCCESS)
            {
                MessageBox.Show("Cannot delete all users", "Error");
                return;
            }

            ReadUserInfo();
        }