how to add a progress bar to indicate a file had finished process

try
            {
                lblUpdate.Visible = true;
                lblUpdate.Refresh();

                string[] filenames = Directory.GetFiles(sTargetFolderPath);

                // Zip up the files - From SharpZipLib Demo Code
                using (ZipOutputStream s = new ZipOutputStream(File.Create(lblSaveTo.Text + "\\" + sZipFileName + ".pld")))
                {
                    s.SetLevel(9); // 0-9, 9 being the highest level of compression

                    byte[] buffer = new byte[4096];

                    foreach (string file in filenames)
                    {

                        ZipEntry entry = new ZipEntry(Path.GetFileName(file));

                        entry.DateTime = DateTime.Now;
                        s.PutNextEntry(entry);

                        using (FileStream fs = File.OpenRead(file))
                        {
                            int sourceBytes;
                            do
                            {
                                sourceBytes = fs.Read(buffer, 0, buffer.Length);
                                s.Write(buffer, 0, sourceBytes);

                            } while (sourceBytes > 0);
                        }
                    }
                    s.Finish();
                    s.Close();
                }

                // remove the progress bar
                lblUpdate.Visible = false;

                // clean up files by deleting the temp folder and its content
                System.IO.Directory.Delete(lblSaveTo.Text + "\\TempZipFile\\", true);

                // Notify user
                MessageBox.Show("Compress file " + lblSaveTo.Text + " created.");

                // empty everything
                lstFilePaths.Items.Clear();
                lblSaveTo.Text = string.Empty;
                txtAddFile.Text = string.Empty;

            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message.ToString(), "Compression Operation Error");
            }