expression.AddFieldSet(Name)
expression Required. An expression that returns a PivotView object.
Name Required String. Specifies the name of the new field set. The name must be unique within the the PivotFieldSets collection. Must be between 1 and 24 characters in length.
Remarks
You must add a calculated field to the new field set before you add it to the current PivotTable view. Custom field sets can contain only one calculated field. Adding a second calculated field to a custom field set results in a run-time error.
Note You can add a custom field set to your PivotTable if the PivotTable is connected to an online analytical processing (OLAP) data source, but the field set will not work with the data source.
Example
This example adds a calculated field named "Variance" to a new field set in PivotTable1. The calculated field is then inserted into the PivotTable view.
Sub TestAddFieldSet()
Dim vwView
Dim fsNewFieldSet
Set vwView = PivotTable1.ActiveView
' Add a custom field set to the PivotTable.
Set fsNewFieldSet = vwView.AddFieldSet("Variance")
' Add a calculated total to the newly created field set.
fsNewFieldSet.AddCalculatedField "Variance", _
"Budget Variance", "fldVariance", _
"Budget / Actual"
' Insert the calculated field into the data axis.
vwView.DataAxis.InsertFieldSet fsNewFieldSet
End Sub