WNet function doesn't work C++

Question

I use VS 2012. I want to use finction WNetGetUser:

#include "stdafx.h"
#include "windows.h"
#include "iostream"
using namespace std;

void main()
{
char Name[255];
char Test[255];
DWORD size=255;
if (WNetGetUser(Test,Name,&size)==NO_ERROR)
{
    cout << Name << endl;
}
}

But I got error:unresolved external symbol _WNetGetUserA@12 referenced in function _main

How can I solve this problem? Where can I find right header for including?