private void bw_DoWorkNew(object sender, DoWorkEventArgs e)
        {
            try
            {
                m_fmProgress.lblDescription.Invoke(
                    (MethodInvoker) delegate()
                {
                    m_fmProgress.lblDescription.Text = "Hệ thống đang xử lý dữ liệu ... ";
                }
                    );
            }
            catch (Exception ex)
            {
            }

            DoiTac.CapNhatDuLieu();

            if (m_fmProgress.Cancel)
            {
                // Set the e.Cancel flag so that the WorkerCompleted event
                // knows that the process was canceled.
                e.Cancel = true;
                return;
            }
        }