Problem do not reference libwebsocket in project win32 VS2013

Hi all!

I am having a problem about compile socket.io in project Win32 VS2013!
when compile project then occurred error as below:

*Error    11    error LNK2019: unresolved external symbol _libwebsocket_callback_on_writable referenced in function “private: int __thiscall cocos2d::network::WebSocket::onSocketCallback(struct libwebsocket_context *,struct libwebsocket *,int,void *,void *,long)” (?onSocketCallback@WebSocket@network@cocos2d@@AAEHPAUlibwebsocket_context@@PAUlibwebsocket@@HPAX2J@Z)    D:\android\project\demo\proj.win32\libNetwork.lib(WebSocket.obj)    demo

My code in attach file
test_socket.zip (3.4 KB)

Can you please help me to resolve this problem, very thanks!