### - u -

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