private void bw4_RunWorkerCompleted(Object sender, RunWorkerCompletedEventArgs e)
        {
            if (e.Error != null)
            {
                ResultBox4.AppendText("BW stopped. Errors occured." + Environment.NewLine);
                ResultBox4.AppendText(e.Result.ToString() + "" + Environment.NewLine);
                totalErrors4++;
            }
            else
            {
                if (e.Cancelled)
                {
                    ResultBox4.AppendText("Cancelled by user." + Environment.NewLine);
                    totalErrors4++;
                }
                else
                {
                    WorkResult result = e.Result as WorkResult;
                    ResultBox4.AppendText(result.ToString() + Environment.NewLine);
                    totalErrors4 += result.errors();
                }
            }

            Start4.Enabled = true;
        }
        private void bw4_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            this.progressBar4.Value = e.ProgressPercentage;
            string reportmsg = e.UserState as String;

            ResultBox4.AppendText(reportmsg + Environment.NewLine);
        }
        private void Start4_Click(object sender, EventArgs e)
        {
            Start4.Enabled = false;
            totalErrors4   = 0;

            if (bw4.IsBusy != true)
            {
                bw4.RunWorkerAsync();
                ResultBox4.AppendText("Running..." + Environment.NewLine);
            }
        }