vs2013 编译出现以下错误，应该是没有加载WinSock2的lib（Ws2_32.lib）.如果在文档中说明就更好了。

[lib1256]

Error 12 error LNK2019: unresolved external symbol ___WSAFDIsSet@8 referenced in function "int __cdecl co::connect_mode_hook<int (__cdecl*)(unsigned int,struct sockaddr const *,int),struct sockaddr const * &,int &>(int (_cdecl)(unsigned int,struct sockaddr const *,int),char const *,unsigned int,struct sockaddr const * &,int &)" (??$connect_mode_hook@P6AHIPBUsockaddr@@h@ZAAPBU1@AAH@co@@YAHP6AHIPBUsockaddr@@h@ZPBDIAAPBU1@AAH@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo
Error 13 error LNK2019: unresolved external symbol __imp__ioctlsocket@12 referenced in function "bool __cdecl co::SetNonblocking(unsigned int,bool)" (?SetNonblocking@co@@YA_NI_N@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo
Error 14 error LNK2019: unresolved external symbol __imp__getsockopt@20 referenced in function "bool __cdecl co::IsNonblocking(unsigned int)" (?IsNonblocking@co@@YA_NI@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo
Error 15 error LNK2019: unresolved external symbol __imp__select@20 referenced in function "int __cdecl co::connect_mode_hook<int (_cdecl)(unsigned int,struct sockaddr const _,int),struct sockaddr const * &,int &>(int (_cdecl)(unsigned int,struct sockaddr const *,int),char const *,unsigned int,struct sockaddr const * &,int &)" (??$connect_mode_hook@P6AHIPBUsockaddr@@h@ZAAPBU1@AAH@co@@YAHP6AHIPBUsockaddr@@h@ZPBDIAAPBU1@AAH@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo
Error 16 error LNK2019: unresolved external symbol __imp__setsockopt@20 referenced in function "int __cdecl co::hook_ioctlsocket(unsigned int,long,unsigned long *)" (?hook_ioctlsocket@co@@YAHIJPAK@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo
Error 17 error LNK2019: unresolved external symbol __imp__WSASetLastError@4 referenced in function "int __cdecl co::hook_ioctlsocket(unsigned int,long,unsigned long *)" (?hook_ioctlsocket@co@@YAHIJPAK@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo
Error 18 error LNK2019: unresolved external symbol __imp__WSAGetLastError@0 referenced in function "int __cdecl co::hook_ioctlsocket(unsigned int,long,unsigned long *)" (?hook_ioctlsocket@co@@YAHIJPAK@Z) D:\libin\libgo\vs_proj\vs2013\Demo\libgo_d.lib(win_vc_hook.obj) Demo