IN mechanical API's Symbbauto 3.0 (Mechanical 2012) i find PartList's Filters, Such as McadPartListBalloonedFilter, McadPartListCustomFilter, McadPartListStdPartsFilter, and i can use them. But the other Filter for parts (McadFilterType.sbFilterParts) ,I can't find any example about it. How to realize this function, who can help me. In my program's has some code for McadPartListCustomFilter : Dim newFilter As SymBBAuto.McadPartListCustomFilter newFilter = oPartList.AddFilterType(McadFilterType.sbFilterCustom) newFilter.SetCondition("Qty", McadFilterOperator.sbContains, "1") newFilter.IsOn = False Filters.Add(newFilter) thisnks