This browser is no longer supported. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Windows Core Networking APIs and technologies such as Winsock, TCP/IP stack, WFP, IPsec, IPv6, WSK, WinINet, Http.sys, WinHttp, QoS, and System.Net Final version of Windows Web Services API for Windows XP, Vista, Server 2003 and Server 2008 is now availa