下列函式是針對 DNS 所定義。
- DnsAcquireContextHandle
- DnsCancelQuery
- DnsCancelQueryRaw
- DnsExtractRecordsFromMessage
- DnsFree
- DnsFreeCustomServers
- DnsFreeProxyName
- DnsGetApplicationSettings
- DnsGetProxyInformation
- DnsModifyRecordsInSet
- DnsNameCompare
- DnsQuery
- DnsQueryConfig
- DnsQueryEx
- DnsQueryRaw
- DnsQueryRawResultFree
- DnsRecordCompare
- DnsRecordCopyEx
- DnsRecordListFree
- DnsRecordSetCompare
- DnsRecordSetCopyEx
- DnsRecordSetDetach
- DnsReleaseContextHandle
- DnsReplaceRecordSet
- DnsServiceBrowse
- DnsServiceBrowseCancel
- DnsServiceConstructInstance
- DnsServiceCopyInstance
- DnsServiceDeRegister
- DnsServiceFreeInstance
- DnsServiceRegister
- DnsServiceRegisterCancel
- DnsServiceResolve
- DnsServiceResolveCancel
- DnsSetApplicationSettings
- DnsStartMulticastQuery
- DnsStopMulticastQuery
- DnsValidateName
- DnsValidateServerStatus
- DnsWriteQuestionToBuffer