diff --git a/PInvoke/Ws2_32/WinSock2.cs b/PInvoke/Ws2_32/WinSock2.cs
index 96157ca8..e1ab46ec 100644
--- a/PInvoke/Ws2_32/WinSock2.cs
+++ b/PInvoke/Ws2_32/WinSock2.cs
@@ -180,7 +180,7 @@ namespace Vanara.PInvoke
 		public const int SO_USELOOPBACK = 0x0040;
 
 		/// <summary>A value that indicates a function failure.</summary>
-		public const uint SOCKET_ERROR = unchecked((uint)-1);
+		public const int SOCKET_ERROR = -1;
 
 		/// <summary>The socket option level.</summary>
 		public const int SOL_SOCKET = 0xffff;
@@ -424,141 +424,6 @@ namespace Vanara.PInvoke
 			SG_CONSTRAINED_GROUP = 0x02
 		}
 
-		/// <summary>Protocols. The IPv6 defines are specified in RFC 2292.</summary>
-		public enum IPPROTO
-		{
-			/// <summary/>
-			IPPROTO_HOPOPTS = 0,
-
-			/// <summary>
-			/// The Internet Control Message Protocol (ICMP). This is a possible value when the af parameter is AF_UNSPEC, AF_INET, or
-			/// AF_INET6 and the type parameter is SOCK_RAW or unspecified.
-			/// <para>This protocol value is supported on Windows XP and later.</para>
-			/// </summary>
-			IPPROTO_ICMP = 1,
-
-			/// <summary>
-			/// The Internet Group Management Protocol (IGMP). This is a possible value when the af parameter is AF_UNSPEC, AF_INET, or
-			/// AF_INET6 and the type parameter is SOCK_RAW or unspecified.
-			/// <para>This protocol value is supported on Windows XP and later.</para>
-			/// </summary>
-			IPPROTO_IGMP = 2,
-
-			/// <summary>
-			/// The Bluetooth Radio Frequency Communications (Bluetooth RFCOMM) protocol. This is a possible value when the af parameter is
-			/// AF_BTH and the type parameter is SOCK_STREAM.
-			/// <para>This protocol value is supported on Windows XP with SP2 or later.</para>
-			/// </summary>
-			IPPROTO_GGP = 3,
-
-			/// <summary/>
-			IPPROTO_IPV4 = 4,
-
-			/// <summary/>
-			IPPROTO_ST = 5,
-
-			/// <summary>
-			/// The Transmission Control Protocol (TCP). This is a possible value when the af parameter is AF_INET or AF_INET6 and the type
-			/// parameter is SOCK_STREAM.
-			/// </summary>
-			IPPROTO_TCP = 6,
-
-			/// <summary/>
-			IPPROTO_CBT = 7,
-
-			/// <summary/>
-			IPPROTO_EGP = 8,
-
-			/// <summary/>
-			IPPROTO_IGP = 9,
-
-			/// <summary/>
-			IPPROTO_PUP = 12,
-
-			/// <summary>
-			/// The User Datagram Protocol (UDP). This is a possible value when the af parameter is AF_INET or AF_INET6 and the type
-			/// parameter is SOCK_DGRAM.
-			/// </summary>
-			IPPROTO_UDP = 17,
-
-			/// <summary/>
-			IPPROTO_IDP = 22,
-
-			/// <summary/>
-			IPPROTO_RDP = 27,
-
-			/// <summary/>
-			IPPROTO_IPV6 = 41,
-
-			/// <summary/>
-			IPPROTO_ROUTING = 43,
-
-			/// <summary/>
-			IPPROTO_FRAGMENT = 44,
-
-			/// <summary/>
-			IPPROTO_ESP = 50,
-
-			/// <summary/>
-			IPPROTO_AH = 51,
-
-			/// <summary>
-			/// The Internet Control Message Protocol Version 6 (ICMPv6). This is a possible value when the af parameter is AF_UNSPEC,
-			/// AF_INET, or AF_INET6 and the type parameter is SOCK_RAW or unspecified.
-			/// <para>This protocol value is supported on Windows XP and later.</para>
-			/// </summary>
-			IPPROTO_ICMPV6 = 58,
-
-			/// <summary/>
-			IPPROTO_NONE = 59,
-
-			/// <summary/>
-			IPPROTO_DSTOPTS = 60,
-
-			/// <summary/>
-			IPPROTO_ND = 77,
-
-			/// <summary/>
-			IPPROTO_ICLFXBM = 78,
-
-			/// <summary/>
-			IPPROTO_PIM = 103,
-
-			/// <summary>
-			/// The PGM protocol for reliable multicast. This is a possible value when the af parameter is AF_INET and the type parameter is
-			/// SOCK_RDM. On the Windows SDK released for Windows Vista and later, this protocol is also called IPPROTO_PGM.
-			/// <para>This protocol value is only supported if the Reliable Multicast Protocol is installed.</para>
-			/// </summary>
-			IPPROTO_PGM = 113,
-
-			/// <summary/>
-			IPPROTO_L2TP = 115,
-
-			/// <summary/>
-			IPPROTO_SCTP = 132,
-
-			/// <summary/>
-			IPPROTO_RAW = 255,
-
-			/// <summary/>
-			IPPROTO_MAX = 256,
-
-			/// <summary/>
-			IPPROTO_RESERVED_RAW = 257,
-
-			/// <summary/>
-			IPPROTO_RESERVED_IPSEC = 258,
-
-			/// <summary/>
-			IPPROTO_RESERVED_IPSECOFFLOAD = 259,
-
-			/// <summary/>
-			IPPROTO_RESERVED_WNV = 260,
-
-			/// <summary/>
-			IPPROTO_RESERVED_MAX = 261
-		}
-
 		/// <summary>Indicate either big-endian or little-endian with the values 0 and 1 respectively.</summary>
 		[PInvokeData("winsock2.h", MSDNShortId = "be5f3e81-1442-43c7-9e4e-9eb2b2a05132")]
 		public enum NetworkByteOrder