private void StartIdleProcess(object sender, DoWorkEventArgs e)
        {
            // Get the BackgroundWorker that raised this event.
            //BackgroundWorker worker = sender as BackgroundWorker;

            if (imap != null && imap.IsConnected)
            {
                imap.StopIdle();
                imap.Disconnect();
            }

            imap = new Imap4Client();
            imap.NewMessageReceived += new NewMessageReceivedEventHandler(NewMessageReceived);
            //worker.ReportProgress(1, "Connection...");
            imap.Connect(thisForm.imap4ServerTextbox.Text);
            //worker.ReportProgress(0, "Login...");
            imap.Login(thisForm.usernameTextbox.Text, thisForm.passwordTextbox.Text);
            //worker.ReportProgress(0, "Select 'inbox'...");
            imap.SelectMailbox("inbox");
            //worker.ReportProgress(0, "Start idle...");
            imap.StartIdle();
        }