Graph controls
The SeriesSort property specifies how the series are sorted: ascending, descending, or unsorted.
To specify how the series are sorted:
Select the desired sort type from the SeriesSort drop-down list on the General page of the graph control’s Properties view.
The datatype of the CategorySort property is the grSortType enumerated datatype, which has the values Ascending!, Descending!, Unsorted!, and UserDefinedSort!.
The following example specifies that the series should be unsorted:
gr_1.SeriesSort = Unsorted!