C# Signature:

  [DllImport("ws2_32.dll", CharSet = CharSet.Unicode, SetLastError = true, CallingConvention = CallingConvention.StdCall)]
  public static extern IntPtr WSASocket(ADDRESS_FAMILIES af, SOCKET_TYPE socket_type, PROTOCOL protocol,
        IntPtr lpProtocolInfo, Int32 group, OPTION_FLAGS_PER_SOCKET dwFlags);

VB Signature:

Declare Function WSASocket Lib "ws2_32.dll" (TODO) As TODO

User-Defined Types:

    public enum ADDRESS_FAMILIES : short
    {
        /// <summary>
        /// Unspecified [value = 0].
        /// </summary>
        AF_UNSPEC = 0,
        /// <summary>
        /// Local to host (pipes, portals) [value = 1].
        /// </summary>
        AF_UNIX = 1,
        /// <summary>
        /// Internetwork: UDP, TCP, etc [value = 2].
        /// </summary>
        AF_INET = 2,
        /// <summary>
        /// Arpanet imp addresses [value = 3].
        /// </summary>
        AF_IMPLINK = 3,
        /// <summary>
        /// Pup protocols: e.g. BSP [value = 4].
        /// </summary>
        AF_PUP = 4,
        /// <summary>
        /// Mit CHAOS protocols [value = 5].
        /// </summary>
        AF_CHAOS = 5,
        /// <summary>
        /// XEROX NS protocols [value = 6].
        /// </summary>
        AF_NS = 6,
        /// <summary>
        /// IPX protocols: IPX, SPX, etc [value = 6].
        /// </summary>
        AF_IPX = 6,
        /// <summary>
        /// ISO protocols [value = 7].
        /// </summary>
        AF_ISO = 7,
        /// <summary>
        /// OSI is ISO [value = 7].
        /// </summary>
        AF_OSI = 7,
        /// <summary>
        /// european computer manufacturers [value = 8].
        /// </summary>
        AF_ECMA = 8,
        /// <summary>
        /// datakit protocols [value = 9].
        /// </summary>
        AF_DATAKIT = 9,
        /// <summary>
        /// CCITT protocols, X.25 etc [value = 10].
        /// </summary>
        AF_CCITT = 10,
        /// <summary>
        /// IBM SNA [value = 11].
        /// </summary>
        AF_SNA = 11,
        /// <summary>
        /// DECnet [value = 12].
        /// </summary>
        AF_DECnet = 12,
        /// <summary>
        /// Direct data link interface [value = 13].
        /// </summary>
        AF_DLI = 13,
        /// <summary>
        /// LAT [value = 14].
        /// </summary>
        AF_LAT = 14,
        /// <summary>
        /// NSC Hyperchannel [value = 15].
        /// </summary>
        AF_HYLINK = 15,
        /// <summary>
        /// AppleTalk [value = 16].
        /// </summary>
        AF_APPLETALK = 16,
        /// <summary>
        /// NetBios-style addresses [value = 17].
        /// </summary>
        AF_NETBIOS = 17,
        /// <summary>
        /// VoiceView [value = 18].
        /// </summary>
        AF_VOICEVIEW = 18,
        /// <summary>
        /// Protocols from Firefox [value = 19].
        /// </summary>
        AF_FIREFOX = 19,
        /// <summary>
        /// Somebody is using this! [value = 20].
        /// </summary>
        AF_UNKNOWN1 = 20,
        /// <summary>
        /// Banyan [value = 21].
        /// </summary>
        AF_BAN = 21,
        /// <summary>
        /// Native ATM Services [value = 22].
        /// </summary>
        AF_ATM = 22,
        /// <summary>
        /// Internetwork Version 6 [value = 23].
        /// </summary>
        AF_INET6 = 23,
        /// <summary>
        /// Microsoft Wolfpack [value = 24].
        /// </summary>
        AF_CLUSTER = 24,
        /// <summary>
        /// IEEE 1284.4 WG AF [value = 25].
        /// </summary>
        AF_12844 = 25,
        /// <summary>
        /// IrDA [value = 26].
        /// </summary>
        AF_IRDA = 26,
        /// <summary>
        /// Network Designers OSI &amp; gateway enabled protocols [value = 28].
        /// </summary>
        AF_NETDES = 28,
        /// <summary>
        /// [value = 29].
        /// </summary>
        AF_TCNPROCESS = 29,
        /// <summary>
        /// [value = 30].
        /// </summary>
        AF_TCNMESSAGE = 30,
        /// <summary>
        /// [value = 31].
        /// </summary>
        AF_ICLFXBM = 31
    }

    public enum SOCKET_TYPE : short
    {
        /// <summary>
        /// stream socket
        /// </summary>
        SOCK_STREAM = 1,

        /// <summary>
        /// datagram socket
        /// </summary>
        SOCK_DGRAM = 2,

        /// <summary>
        /// raw-protocol interface
        /// </summary>
        SOCK_RAW = 3,

        /// <summary>
        /// reliably-delivered message
        /// </summary>
        SOCK_RDM = 4,

        /// <summary>
        /// sequenced packet stream
        /// </summary>
        SOCK_SEQPACKET = 5
    }

    public enum PROTOCOL : short
    {//dummy for IP  
        IPPROTO_IP = 0,
        //control message protocol  
        IPPROTO_ICMP = 1,
        //internet group management protocol  
        IPPROTO_IGMP = 2,
        //gateway^2 (deprecated)  
        IPPROTO_GGP = 3,
        //tcp  
        IPPROTO_TCP = 6,
        //pup  
        IPPROTO_PUP = 12,
        //user datagram protocol  
        IPPROTO_UDP = 17,
        //xns idp  
        IPPROTO_IDP = 22,
        //IPv6  
        IPPROTO_IPV6 = 41,
        //UNOFFICIAL net disk proto  
        IPPROTO_ND = 77,

        IPPROTO_ICLFXBM = 78,
        //raw IP packet  
        IPPROTO_RAW = 255,

        IPPROTO_MAX = 256
    }

    public enum OPTION_FLAGS_PER_SOCKET : short
    {
        // turn on debugging info recording  
        SO_DEBUG = 0x0001,
        // socket has had listen()  
        SO_ACCEPTCONN = 0x0002,
        // allow local address reuse  
        SO_REUSEADDR = 0x0004,
        // keep connections alive  
        SO_KEEPALIVE = 0x0008,
        // just use interface addresses  
        SO_DONTROUTE = 0x0010,
        // permit sending of broadcast msgs  
        SO_BROADCAST = 0x0020,
        // bypass hardware when possible  
        SO_USELOOPBACK = 0x0040,
        // linger on close if data present  
        SO_LINGER = 0x0080,
        // leave received OOB data in line  
        SO_OOBINLINE = 0x0100,
        SO_DONTLINGER = (int)(~SO_LINGER),
        // disallow local address reuse
        SO_EXCLUSIVEADDRUSE = ((int)(~SO_REUSEADDR)),

        ///*
        // * Additional options.
        // */
        // send buffer size  
        SO_SNDBUF = 0x1001,
        // receive buffer size  
        SO_RCVBUF = 0x1002,
        // send low-water mark  
        SO_SNDLOWAT = 0x1003,
        // receive low-water mark  
        SO_RCVLOWAT = 0x1004,
        // send timeout  
        SO_SNDTIMEO = 0x1005,
        // receive timeout  
        SO_RCVTIMEO = 0x1006,
        // get error status and clear  
        SO_ERROR = 0x1007,
        // get socket type  
        SO_TYPE = 0x1008,

        ///*
        // * WinSock 2 extension -- new options
        // */
        // ID of a socket group  
        SO_GROUP_ID = 0x2001,
        // the relative priority within a group
        SO_GROUP_PRIORITY = 0x2002,
        // maximum message size  
        SO_MAX_MSG_SIZE = 0x2003,
        // WSAPROTOCOL_INFOA structure  
        SO_PROTOCOL_INFOA = 0x2004,
        // WSAPROTOCOL_INFOW structure  
        SO_PROTOCOL_INFOW = 0x2005,
        // configuration info for service provider  
        PVD_CONFIG = 0x3001,
        // enable true conditional accept: connection is not ack-ed to the other side until conditional function returns CF_ACCEPT  
        SO_CONDITIONAL_ACCEPT = 0x3002
    }

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