property Pivot.IncludeExpandColumn as IncludeExpandColumnEnum
Specifies whether the column itself is displayed in the list (header/chart), while it expanded ( the column contains child columns ).

TypeDescription
IncludeExpandColumnEnum An IncludeExpandColumnEnum expression that specifies whether the column itself is displayed in the list (header/chart), while it expanded ( the column contains child columns ).
By default, the IncludeExpandColumn property is exExcludeExpandColumn (0), which indicates that the column's data is not shown on the chart when it contains child columns, and it is shown as expanded. For instance, you can use the IncludeExpandColumn property to show totals on rows. 

The following screen shot shows the control, when IncludeExpandColumn property is exIncludeExpandColumn:

The following screen shot shows the control, when IncludeExpandColumn property is exExcludeExpandColumn (default ):