C# Definition:

     [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    internal struct WSAData
    {
        internal Int16 version;
        internal Int16 highVersion;
    [StructLayout(LayoutKind.Sequential)]
    public struct WSADATA
    {
      const int WSADESCRIPTION_LEN=256;
      const int WSASYS_STATUS_LEN=128;

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 257)] internal String description;
      public short wVersion;
      public short wHighVersion;
      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = WSADESCRIPTION_LEN + 1)]
      public string szDescription;
      [MarshalAs(UnmanagedType.ByValTStr, SizeConst = WSASYS_STATUS_LEN + 1)]
      public string szSystemStatus;
      [Obsolete] // Ignored for v2.0 and above
      public int wMaxSockets;
      [Obsolete] // Ignored for v2.0 and above
      public int wMAXUDPDG;
      public IntPtr dwVendorInfo;
    }

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 129)] internal String systemStatus;

///

/// public int wMaxSockets;

/// should be

/// public ushort wMaxSockets;

///

///

/// public int wMAXUDPDG;

/// should be

/// public ushort wMAXUDPDG;

///

/// Changed by Mike Petrichenko (http://www.btframework.com)

        internal Int16 maxSockets;
        internal Int16 maxUdpDg;
        internal IntPtr vendorInfo;
    }

User-Defined Field Types:

None.

Notes:

dwVendorInfo is now unused (Winsock 2.0 and above)

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