/**
         * Вызов SignData2. Подпись простых данных.
         */
        private void btSignSimple_Click(object sender, EventArgs e)
        {
            PrepareOperation();

            // Ид-р ключа
            string uid = cbKeyId.Items[cbKeyId.SelectedIndex].ToString();

            IOLACOM_OPERFLAGS flags = 0;
            // Флаги
            if (cbDraftData.Checked) flags |= IOLACOM_OPERFLAGS.CF_DRAFT_DATA;
            if (cbInBase64.Checked) flags |= IOLACOM_OPERFLAGS.CF_IN_BASE64;
            if (cbOutBase64.Checked) flags |= IOLACOM_OPERFLAGS.CF_OUT_BASE64;

            if (cbWithCert.Checked) flags |= IOLACOM_OPERFLAGS.SF_WITH_CERTS;

            if (cbAddInDataInBase64.Checked) flags |= IOLACOM_OPERFLAGS.CF_IN2_BASE64;
            if (cbDetached.Checked) flags |= IOLACOM_OPERFLAGS.SF_DETACHED_DATA;

            try
            {
                // Подпишем простые данные
                string result = iolaCOM_.SignData2(uid, (int)(flags), rbInData.Text, "");
                rbSignedData.Text = result;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);    
            }
        }