Internet Direct (Indy) Version 9.0.2 Beta
TResultRecord.RDataLength
Indicates the length of RData in the resource record.

property RDataLength: Integer;
Description
RDataLength is a read-only Integer property that indicates the length of RDATA values for a resource record read in a DNS query response. RDataLength is updated when the resource record is parsed from the DNS response packet, and added to TQueryResult in TIdDNSResolver.Resolve.