Sets or returns whether the values labels field should be placed as a Row Label or Column Label

 public boolean CalculatedFieldsOnRow{ get; set; }

Public Property CalculatedFieldsOnRow() As Boolean


          ExcelApplication xla = new ExcelApplication();
          Workbook wb = xla.Open(@"C:\MySpreadsheet.xlsx");
          Worksheet ws = wb.Worksheets[0];
          ws.PivotTables[0].PivotTableSettings.ValuesLabelOnRow = true;
        

          Dim xla As New ExcelApplication()
          Dim wb As Workbook = xla.Open("C:\MySpreadsheet.xlsx")
          Dim ws As Worksheet = wb.Worksheets(0)
          ws.PivotTables(0).PivotTableSettings.ValuesLabelOnRow = true;

ValuesLabelOnRow is false by default.

When creating a pivot table, set this option before adding any fields to ensure the values label field is created where it is intended.
If this option is changed on a pivot table that already has a values label field, that field will be moved to the new position.