interface Infragistics.Win.UltraWinGrid.ICustomSummaryCalculator:

   method public void BeginCustomSummary(input summarySettings as Infragistics.Win.UltraWinGrid.SummarySettings, input rows as Infragistics.Win.UltraWinGrid.RowsCollection).

   method public void AggregateCustomSummary(input summarySettings as Infragistics.Win.UltraWinGrid.SummarySettings, input row as Infragistics.Win.UltraWinGrid.UltraGridRow).

   method public System.Object EndCustomSummary(input summarySettings as Infragistics.Win.UltraWinGrid.SummarySettings, input rows as Infragistics.Win.UltraWinGrid.RowsCollection).

end interface.
