error LNK2019: unresolved external symbol _WSInitialize

I tried to run very simple example of connecting to WSTP. I checked a few links in this site but none of them could resolved my issue. I added three .lib files to visual studio location from this link and also linked to my program on visual studio. Also i did it for wstp.h and .exe. each one as explained in documentation
developer tutorial. I modified the linker on C++ project and added all these files to current project on visual studio. But still i am getting this problem. I wish they had better documentation. Can someone help me , thanks
error LNK2019: unresolved external symbol _WSInitialize
error LNK2019: unresolved external symbol _WSDeinitialize
error LNK2019: unresolved external symbol _WSOpenString
error LNK2019: unresolved external symbol _WSClose

#include "wstp.h"
#include<iostream>
using namespace std;
int main()
{
    WSENV env;
    WSLINK link;
    int error;

    env = WSInitialize((WSEnvironmentParameter)0);
    if (env == (WSENV)0)
    { /* unable to initialize WSTP environment */
    }

    link = WSOpenString(env, "/usr/local/bin/math -mathlink", &error);
    if (link == (WSLINK)0 || error != WSEOK)
    { /* unable to create link to the Kernel */
    }

    /* ... */

    WSClose(link);
    WSDeinitialize(env);

    return 0;
}

EDITED Solved: beside the right answer, i should have compile as x64 because my system is 64bit, but i ran the program as x86 and got those errors