title: socket errors can't get functions in WinSock2.h
body: <p>I have created a socket wrapper class but I have too many errors that I cannot figure out how to solve.  I tried <a href="https://stackoverflow.com/questions/4385418/winsock-tutorial-error">Winsock tutorial error</a> and <a href="https://stackoverflow.com/questions/11726958/cant-include-winsock2-h-in-msvc-2010">Can't include Winsock2.h in MSVC 2010</a>, but no use </p>
  
  <p>Here is the code :</p>
  
  <pre><code>//#define WIN32_LEAN_AND_MEAN
  #include &lt;iostream&gt;
  #include &lt;string&gt;
  #include &lt;Windows.h&gt;
  #include &lt;WinSock2.h&gt;
  #include &lt;WS2tcpip.h&gt;
  #pragma  comment(lib,"ws2_32_lib")
  using namespace std;
  #define WM_SOCKET 0x10000
  
  class Socket 
  {
  
  
  }; 
  </code></pre>
  
  <p>Here are the errors:</p>
  
  <pre><code>Error   107 error C3861: 'WSAStartup': identifier not found \85 1   Project2_SocketLib
  Error   89  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   696 1   Project2_SocketLib
  Error   90  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   703 1   Project2_SocketLib
  Error   91  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   742 1   Project2_SocketLib
  Error   92  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   749 1   Project2_SocketLib
  Error   93  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   793 1   Project2_SocketLib
  Error   94  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   800 1   Project2_SocketLib
  Error   95  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   841 1   Project2_SocketLib
  Error   96  error C3861: 'WSASetLastError': identifier not found    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WS2tcpip.h   848 1   Project2_SocketLib
  Error   109 error C3861: 'WSAGetLastError': identifier not found    \87 1   Project2_SocketLib
  Error   112 error C3861: 'WSAGetLastError': identifier not found    \93 1   Project2_SocketLib
  Error   105 error C3861: 'WSACleanup': identifier not found \63 1   Project2_SocketLib
  Error   103 error C3861: 'shutdown': identifier not found   \57 1   Project2_SocketLib
  Error   100 error C3861: 'send': identifier not found   \37 1   Project2_SocketLib
  Error   101 error C3861: 'send': identifier not found   \43 1   Project2_SocketLib
  Error   98  error C3861: 'recv': identifier not found   \31 1   Project2_SocketLib
  Error   99  error C3861: 'recv': identifier not found   \34 1   Project2_SocketLib
  Error   116 error C3861: 'inet_ntoa': identifier not found  \115    1   Project2_SocketLib
  Error   119 error C3861: 'htons': identifier not found  \137    1   Project2_SocketLib
  Error   126 error C3861: 'htonl': identifier not found  \139    1   Project2_SocketLib
  Error   104 error C3861: 'closesocket': identifier not found    \58 1   Project2_SocketLib
  Error   102 error C3861: 'accept': identifier not found \50 1   Project2_SocketLib
  Error   6   error C3805: 'constant': unexpected token, expected either '}' or a ',' C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2def.h 414 1   Project2_SocketLib
  Error   108 error C2568: '+' : unable to resolve function overload  \87 1   Project2_SocketLib
  Error   111 error C2568: '+' : unable to resolve function overload  \93 1   Project2_SocketLib
  Error   124 error C2568: ':' : unable to resolve function overload  \139    1   Project2_SocketLib
  Error   125 error C2446: ':' : no conversion from 'unsigned long (__stdcall *)(const char *)' to 'u_long (__stdcall *)(u_long)' \139    1   Project2_SocketLib
  Error   106 error C2440: '=' : cannot convert from 'WSADATA' to 'int'   \75 1   Project2_SocketLib
  Error   110 error C2440: '=' : cannot convert from 'SOCKET (__stdcall *)(int,int,int)' to 'SOCKET'  \90 1   Project2_SocketLib
  Error   115 error C2440: '=' : cannot convert from 'char *(__stdcall *)(in_addr)' to 'std::string'  \115    1   Project2_SocketLib
  Error   66  error C2375: 'WSAUnhookBlockingHook' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2383    1   Project2_SocketLib
  Error   61  error C2375: 'WSAStartup' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2296    1   Project2_SocketLib
  Error   63  error C2375: 'WSASetLastError' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2332    1   Project2_SocketLib
  Error   67  error C2375: 'WSASetBlockingHook' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2400    1   Project2_SocketLib
  Error   65  error C2375: 'WSAIsBlocking' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2366    1   Project2_SocketLib
  Error   64  error C2375: 'WSAGetLastError' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2349    1   Project2_SocketLib
  Error   62  error C2375: 'WSACleanup' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2315    1   Project2_SocketLib
  Error   68  error C2375: 'WSACancelBlockingCall' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2417    1   Project2_SocketLib
  Error   75  error C2375: 'WSACancelAsyncRequest' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2592    1   Project2_SocketLib
  Error   76  error C2375: 'WSAAsyncSelect' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2612    1   Project2_SocketLib
  Error   70  error C2375: 'WSAAsyncGetServByPort' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2466    1   Project2_SocketLib
  Error   69  error C2375: 'WSAAsyncGetServByName' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2439    1   Project2_SocketLib
  Error   72  error C2375: 'WSAAsyncGetProtoByNumber' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2517    1   Project2_SocketLib
  Error   71  error C2375: 'WSAAsyncGetProtoByName' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2492    1   Project2_SocketLib
  Error   73  error C2375: 'WSAAsyncGetHostByName' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2542    1   Project2_SocketLib
  Error   74  error C2375: 'WSAAsyncGetHostByAddr' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2569    1   Project2_SocketLib
  Error   53  error C2375: 'socket' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2120    1   Project2_SocketLib
  Error   52  error C2375: 'shutdown' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2099    1   Project2_SocketLib
  Error   51  error C2375: 'setsockopt' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2077    1   Project2_SocketLib
  Error   50  error C2375: 'sendto' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2051    1   Project2_SocketLib
  Error   49  error C2375: 'send' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2026    1   Project2_SocketLib
  Error   48  error C2375: 'select' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2002    1   Project2_SocketLib
  Error   47  error C2375: 'recvfrom' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1976    1   Project2_SocketLib
  Error   46  error C2375: 'recv' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1951    1   Project2_SocketLib
  Error   45  error C2375: 'ntohs' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1931    1   Project2_SocketLib
  Error   44  error C2375: 'ntohl' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1914    1   Project2_SocketLib
  Error   43  error C2375: 'listen' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1896    1   Project2_SocketLib
  Error   35  error C2375: 'ioctlsocket' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1658    1   Project2_SocketLib
  Error   42  error C2375: 'inet_ntoa' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1795    1   Project2_SocketLib
  Error   41  error C2375: 'inet_addr' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1778    1   Project2_SocketLib
  Error   40  error C2375: 'htons' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1761    1   Project2_SocketLib
  Error   39  error C2375: 'htonl' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1744    1   Project2_SocketLib
  Error   38  error C2375: 'getsockopt' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1723    1   Project2_SocketLib
  Error   37  error C2375: 'getsockname' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1700    1   Project2_SocketLib
  Error   57  error C2375: 'getservbyport' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2221    1   Project2_SocketLib
  Error   58  error C2375: 'getservbyname' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2240    1   Project2_SocketLib
  Error   59  error C2375: 'getprotobynumber' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2258    1   Project2_SocketLib
  Error   60  error C2375: 'getprotobyname' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2275    1   Project2_SocketLib
  Error   36  error C2375: 'getpeername' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1679    1   Project2_SocketLib
  Error   56  error C2375: 'gethostname' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2181    1   Project2_SocketLib
  Error   55  error C2375: 'gethostbyname' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2163    1   Project2_SocketLib
  Error   54  error C2375: 'gethostbyaddr' : redefinition; different linkage  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   2144    1   Project2_SocketLib
  Error   34  error C2375: 'connect' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1637    1   Project2_SocketLib
  Error   33  error C2375: 'closesocket' : redefinition; different linkage    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1618    1   Project2_SocketLib
  Error   32  error C2375: 'bind' : redefinition; different linkage   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1599    1   Project2_SocketLib
  Error   31  error C2375: 'accept' : redefinition; different linkage C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   1577    1   Project2_SocketLib
  Error   118 error C2228: left of '.sin_port' must have class/struct/union   \137    1   Project2_SocketLib
  Error   120 error C2228: left of '.sin_family' must have class/struct/union \138    1   Project2_SocketLib
  Error   121 error C2228: left of '.sin_addr' must have class/struct/union   \139    1   Project2_SocketLib
  Error   122 error C2228: left of '.S_un' must have class/struct/union   \139    1   Project2_SocketLib
  Error   123 error C2228: left of '.S_addr' must have class/struct/union \139    1   Project2_SocketLib
  Error   114 error C2227: left of '-&gt;sin_addr' must point to class/struct/union/generic type \115    1   Project2_SocketLib
  Error   97  error C2079: 'Socket::wsaData' uses undefined struct 'WSAData'  \18 1   Project2_SocketLib
  Error   117 error C2079: 'sockAddrIn' uses undefined struct 'sockaddr_in'   \135    1   Project2_SocketLib
  Error   78  error C2079: 'sockaddr_gen::AddressIn' uses undefined struct 'sockaddr_in'  C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2ipdef.h   81  1   Project2_SocketLib
  Error   77  error C2079: 'sockaddr_gen::Address' uses undefined struct 'sockaddr'   C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2ipdef.h   80  1   Project2_SocketLib
  Error   87  error C2079: '_SOCKADDR_INET::Ipv4' uses undefined struct 'sockaddr_in' C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2ipdef.h   202 1   Project2_SocketLib
  Error   5   error C2059: syntax error : 'constant'  C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2def.h 414 1   Project2_SocketLib
  Error   113 error C2027: use of undefined type 'sockaddr_in'    \115    1   Project2_SocketLib
  Error   21  error C2011: 'WSAData' : 'struct' type redefinition C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   353 1   Project2_SocketLib
  Error   16  error C2011: 'timeval' : 'struct' type redefinition C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   169 1   Project2_SocketLib
  Error   22  error C2011: 'sockproto' : 'struct' type redefinition   C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   451 1   Project2_SocketLib
  Error   12  error C2011: 'sockaddr_in' : 'struct' type redefinition C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2def.h 608 1   Project2_SocketLib
  Error   4   error C2011: 'sockaddr' : 'struct' type redefinition    C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2def.h 217 1   Project2_SocketLib
  Error   19  error C2011: 'servent' : 'struct' type redefinition C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   245 1   Project2_SocketLib
  Error   20  error C2011: 'protoent' : 'struct' type redefinition    C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   257 1   Project2_SocketLib
  Error   18  error C2011: 'netent' : 'struct' type redefinition  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   238 1   Project2_SocketLib
  Error   23  error C2011: 'linger' : 'struct' type redefinition  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   493 1   Project2_SocketLib
  Error   88  error C2011: 'ip_mreq' : 'struct' type redefinition C:\Program Files (x86)\Windows Kits\8.0\Include\shared\ws2ipdef.h   715 1   Project2_SocketLib
  Error   17  error C2011: 'hostent' : 'struct' type redefinition C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   225 1   Project2_SocketLib
  Error   13  error C2011: 'fd_set' : 'struct' type redefinition  C:\Program Files (x86)\Windows Kits\8.0\Include\um\WinSock2.h   125 1   Project2_SocketLib
  Error   127 error C1003: error count exceeds 100; stopping compilation  \139    1   Project2_SocketLib
  </code></pre>