### - u -

- unempty : PQueueChannel
- unfull : PQueueChannel
- units : PHTTPIntegerField
- unReadBuffer : PInternetProtocol
- unReadCount : PInternetProtocol
- Unused : _DnsRecordFlags
- upperLimit : PASN_ConstrainedObject
- url : PXMLRPC, PSOAPClient, PHTTPRequest, PHTTPConnectionInfo
- urlSpace : PHTTPServer
- urlString : PURL
- used : MXRecord, PDNS::SRVRecord
- UseDMA : PVideoInput1394DcDevice
- User : XMPP::MUC::User, PODBC::ConnectData
- username : PURL, PPOP3Server, PHTTPSimpleAuth, PHTTPClientAuthentication
- userName : PFTPServer, PRemoteConnection
- users : PHTTPMultiSimpAuth