static public void notifyAll()
        {
            DataAbstract DA = new DataAbstract();

            DataTable userIDs = DA.returnAllUserIDs().Tables[0];

            for (int rows = 0; rows < userIDs.Rows.Count; ++rows)
            {
                int user = Convert.ToInt32(userIDs.Rows[rows].Field <object>("UserID"));
                notifyOne(user);
            }//end of userID
        }