private void BtnGo_Click(object sender, EventArgs e)
        {
            try
            {
                this.Enabled       = false;
                this.UseWaitCursor = true;
                Cursor.Current     = Cursors.WaitCursor;

                if (string.IsNullOrWhiteSpace(txtAccountNumber.Text) ||
                    string.IsNullOrWhiteSpace(txtAWBNumber.Text))
                {
                    MessageBox.Show(@"Missing data.");
                    return;
                }

                txtAccountNumber.Text = txtAccountNumber.Text.Trim();
                txtAWBNumber.Text     = txtAWBNumber.Text.Trim();

                MyDHLAPI api = new MyDHLAPI(Common.CurrentCredentials["Username"]
                                            , Common.CurrentCredentials["Password"]
                                            , Common.CurrentRestBaseUrl);

                EPodResponse ePod = api.GetEPod(txtAWBNumber.Text
                                                , txtAccountNumber.Text
                                                // ReSharper disable once PossibleInvalidCastException
                                                , (Enums.EPodType)cmbPODType.SelectedItem);

                _lastJsonRequest  = api.LastEPoDJSONRequest;
                _lastJsonResponse = api.LastEPoDJSONResponse;

                if (null != ePod && null != ePod.EPod)
                {
                    string tempFilename = System.IO.Path.GetTempFileName();
                    switch (ePod.EPod.MimeType)
                    {
                    case "application/pdf":
                        tempFilename += ".pdf";
                        break;

                    case "image/jpeg":
                    case "image/jpg":
                        tempFilename += ".jpg";
                        break;

                    case "image/png":
                        tempFilename += ".png";
                        break;
                    }
                    System.IO.File.WriteAllBytes(tempFilename, ePod.EPod.Image);

                    System.Diagnostics.Process.Start(tempFilename);
                }
                else
                {
                    txtResult.Text = "ePOD not found for the supplied AWB # and Account # combination.";
                }
            }
            catch (MyDHLAPIValidationException gvx)
            {
                txtResult.Text = MyDHLAPIValidationException.PrintResults(gvx.ExtractValidationResults(), 0);
            }
            catch (Exception ex)
            {
                txtResult.Text = ex.Message;
            }
            finally
            {
                this.Enabled       = true;
                this.UseWaitCursor = false;
                Cursor.Current     = Cursors.Default;
            }
        }