private void UploadButton_Click(object sender, EventArgs e)
        {
            String fileName = FiletextBox.Text;
            String urlstring= UrlTextBox.Text;
            progressBar.Value = 0;
            progressBar.Minimum = 0;
            progressBar.Maximum = 100;
            progressBar.Step = 1;
            if (fileName != "" && urlstring != "")
            {
                uploader = new Uploader(urlstring, fileName);

                statusDelegate st = new statusDelegate(setStatusMessage);
                cbProgress prog = new cbProgress(onProgress);

                uploader.startUpload(st,prog);

                //this.Close();
            }
        }