private string SetUserChoice(int AD_User_ID, string value, int dt, string textMsg, MWFActivity _activity, MWFNode _node)
 {
     try
     {
         _activity.SetUserChoice(AD_User_ID, value, dt, textMsg);
         return("OK");
     }
     catch (Exception ex)
     {
         //Dispatcher.BeginInvoke(delegate
         //{
         //    SetBusy(false);
         //    log.Log(Level.SEVERE, _node.GetName(), ex);
         //    ShowMessage.Error("Error", true, ex.ToString());
         //    return;
         //});
         return("Error" + ex.Message);
     }
 }