private void tsbtnPreview_Click(object sender, EventArgs e)
        {
            if (messagePreview == null || messagePreview.IsDisposed)
            {
                messagePreview = new MessagePreviewForm(message);
            }

            messagePreview.Show();
            messagePreview.Focus();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            if (job != null && job.messageObject != null)
            {
                MessagePreviewForm messagePreview =new MessagePreviewForm(job.messageObject);

                messagePreview.Show();
                messagePreview.Focus();
            }
        }