CuteChat.ChatPortal portal=CuteChat.AppSystem.Instance.GetCurrentPortal();
             lock (portal)
             {
                 if (portal.IsMessengerStarted)
                 {
                     CuteChat.ChatPlaceUser[] users = portal.Messenger.GetAllUsers();
                     foreach (CuteChat.ChatPlaceUser user in users)
                     {
                         portal.Messenger.Manager.PushSTCMessage(user.Connection, ChatMetaData.ServerMsg_SYS_ALERT_MESSAGE, null, "Hello,World!");
                     }
                 }
             }