Ошибка unresoved externals

#include "stdafx.h"
#define _WIN32_WINNT 0x0500
#include <windows.h>
 
HHOOK hook;
BOOL fEatKeystroke = true;
LRESULT CALLBACK KeyboardProc(int key, WPARAM wParam, LPARAM lParam){
 
 
    PKBDLLHOOKSTRUCT p = (PKBDLLHOOKSTRUCT)lParam;
    if (key < 0)
    {
        return  CallNextHookEx(hook, 0, 0, 0);
    }
 
    switch (wParam)
    {
    case WM_KEYDOWN:
        if ((p->vkCode == 0x30) && (fEatKeystroke == true))
        {
            CallNextHookEx(hook, 0, 0, 0);
            return -1;
            break;
        }
    case WM_SYSKEYDOWN:
    case WM_KEYUP:
    case WM_SYSKEYUP:
        if (((p->vkCode == VK_LCONTROL) && ((p->flags & LLKHF_ALTDOWN))))
        {
            fEatKeystroke = !fEatKeystroke;
        }
        break;
    }
 
    return CallNextHookEx(hook, 0, 0, 0);;
}
 
void StayAlive(){
    MSG message;
    while (GetMessage(&message, NULL, 0, 0)){
        TranslateMessage(&message);
        DispatchMessage(&message);
    }
}
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
    LPSTR lpCmdLine, int nShowCmd){
    FreeConsole();
 
    hook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardProc, hInstance, 0);
    StayAlive();
 
    UnhookWindowsHookEx(hook);
    return 0;
}