Use the FilterRecordCount property to determine the total number of records, including active filters (or WHERE clauses with live query result sets), when the TDBISAMEngineFilterRecordCounts property is set to False. If the TDBISAMEngine FilterRecordCounts property is set to True, then the FilterRecordCount property always matches that of the RecordCount property.
This property is only used in the context of the descendant TDBISAMTable and TDBISAMQuery components.