procedure Parse(
    CompleteMessage: TIdBytes; 
    APos: Integer
); override;

Parse is an overridden method in TAAAARecord used convert and populate values found in CompleteMessage for use in the Address property. 

Parse calls the inherited method prior to parsing values specific to the AAAA resource record type. 

Parse performs no processing if the value in RData is less than 15 bytes long. 

Parse converts the values in RData to an IPv6 address, an converts the 128-bit IP address from its Network byte ordering to the Host-specific byte ordering using the global stack instance in GStack. 

The string representation for the IPv6 address is stored in the Address property.