Public Function GetAggregationResult( _
   ByVal row As Integer, _
   ByVal column As Integer, _
   ByVal rowCount As Integer, _
   ByVal columnCount As Integer, _
   ByVal aggType As AggregationType, _
   ByVal aggformula As String _
) As Object

Dim instance As DefaultSheetDataModel
Dim row As Integer
Dim column As Integer
Dim rowCount As Integer
Dim columnCount As Integer
Dim aggType As AggregationType
Dim aggformula As String
Dim value As Object
 
value = instance.GetAggregationResult(row, column, rowCount, columnCount, aggType, aggformula)

public object GetAggregationResult( 
   int row,
   int column,
   int rowCount,
   int columnCount,
   AggregationType aggType,
   string aggformula
)