//Meeting beitreten
        public static void Button2_Execute()
        {
            InventorApp.ActiveDocument.Save();
            UserID Sesion = new UserID();
            //Session = Sesion;
            string sessionid = Sesion.getID();

            if (network != null && network.connected)
            {
                return;
            }
            if (network == null || network.connected == false)
            {
                initializenw();
                try
                {
                    network.connect(sessionid, InventorApp.ActiveDocument.FullFileName);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
            InventorApp.Visible       = false;
            Session                   = new GUI(InventorApp, updatestatus, updateinfo);
            Session.network           = network;
            Session.lblMeetingID.Text = sessionid;
            Session.ShowDialog();
            InventorApp.Visible = true;
        }