function ParseQuery(
    Data: TIdBytes
): integer;

Integer - 0 on success, or -1 on error.

ParseQuery is an Integer function used to parse and store property values found in the raw DNS header in Data. 

ParseQuery returns 0 (zero) on successful completion of the parsing operation, or -1 when Data does not contain at leasst 12 byte values as required in a valid DNS header. 

ParseQuery converts numeric values in Data from their network byte order representation to their host-specific byte order representation prior to storing the values in the properties for the DNS header. This includes the following properties: