RPC Message Types TopicsGetting the Message TypekIORPCMessageErrorkIORPCMessageKernelkIORPCMessageLocalHostkIORPCMessageObjectRefskIORPCMessageOnewaykIORPCMessageOnqueuekIORPCMessageRemotekIORPCMessageSimpleReply See AlsoRPC SupportIORPCIORPCMessageIORPCMessageMachIORPCMessageErrorReturnOSClassLoadInformationOSClassDescriptionOSDispatchMethodRPC Message IDRPC CapabilitiesRPC VersionIORPCMessageFromMach