Ошибка линковки

bool CParser::IsFileExist()
{
    if ( PathFileExistsW( path_file.c_str() ) ) return true;
    return false;
}

#pragma once
#include'ы
[SPOILER]#include <Windows.h>
#include <Shlwapi.h>
#include <io.h>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <vector>
#include <string>
#include "userfn.h"
#include "usertypes.h"
[/SPOILER]
#include "engine/Object.h"
class CParser
{
// Field:
    std::wstring path_file;
public:
    void LoadFromEcad(CObject & object, const std::wstring & path);
private:
    bool IsFileExist()
    {
        if ( PathFileExistsW( path_file.c_str() ) ) return true;
        return false;
    }
};

class CParser
{
// Field:
    std::wstring path_file;
public:
    void LoadFromEcad(CObject & object, const std::wstring & path);
private:
    inline bool IsFileExist()
    {
        if ( PathFileExistsW( path_file.c_str() ) ) return true;
        return false;
    }
};

#include "Parser.h"
void CParser::LoadFromEcad( CObject & object, const std::wstring & file_name )
{
    if (IsFileExist())
    {
        MessageBox(NULL,L"Message about error",L"OK",MB_OK);
    }
    else
    {
        MessageBox(NULL,L"Message about error",L"Abort",MB_OK);
    }
}

return PathFileExistsW(path_file.c_str()) == TRUE;