private void customizePointGroup(ObjectId id)
        {
            PointGroup            group = id.GetObject(OpenMode.ForWrite) as PointGroup;
            CustomPointGroupQuery query = new CustomPointGroupQuery();

            query.QueryString = "RawDescription='WELL*'";
            group.SetQuery(query);
            group.UseCustomClassification(_classification);
        }
        private void createCustomPointGroup()
        {
            string queryString =
                @"(PointNumber>=100 AND PointNumber<200) OR 
                        (FullDescription='Contains*' OR RawDescription='WE*')";
            CustomPointGroupQuery custom = new CustomPointGroupQuery();

            custom.QueryString = queryString;
            createPointGroup("Custom Group", custom);
        }