Ошибки декларирования функций при компиляции DLL

#include "pch.h"
#include "BeepHook.h"
#include "easyhook.h"
#include <string>
#include <iostream>
#include <Windows.h>
#include <stdlib.h>
#include <libloaderapi.h>
#include <utilapiset.h>
 
#if _WIN64
#pragma comment(lib, "EasyHook64.lib")
#else
#pragma comment(lib, "EasyHook32.lib")
#endif
 
//extern HMODULE WINAPI GetModuleHandle(LPCTSTR lpModuleName);
//extern BOOL WINAPI Beep( DWORD dwFreq, DWORD dwDuration);
 
DWORD gFreqOffset = 0;
BOOL WINAPI myBeepHook(DWORD dwFreq, DWORD dwDuration)
{
    std::cout << "\n    BeepHook: ****All your beeps belong to us!\n\n";
    return Beep(dwFreq + gFreqOffset, dwDuration);
}
 
// EasyHook will be looking for this export to support DLL injection. If not found then 
// DLL injection will fail.
extern "C" void __declspec(dllexport) __stdcall NativeInjectionEntryPoint(REMOTE_ENTRY_INFO* inRemoteInfo);
 
void __stdcall NativeInjectionEntryPoint(REMOTE_ENTRY_INFO* inRemoteInfo)
{
    std::cout << "\n\nNativeInjectionEntryPointt(REMOTE_ENTRY_INFO* inRemoteInfo)\n\n" <<
        "IIIII           jjj               tt                dd !!! \n"
        " III  nn nnn          eee    cccc tt      eee       dd !!! \n"
        " III  nnn  nn   jjj ee   e cc     tttt  ee   e  dddddd !!! \n"
        " III  nn   nn   jjj eeeee  cc     tt    eeeee  dd   dd     \n"
        "IIIII nn   nn   jjj  eeeee  ccccc  tttt  eeeee  dddddd !!! \n"
        "              jjjj                                         \n\n";
 
    std::cout << "Injected by process Id: " << inRemoteInfo->HostPID << "\n";
    std::cout << "Passed in data size: " << inRemoteInfo->UserDataSize << "\n";
    if (inRemoteInfo->UserDataSize == sizeof(DWORD))
    {
        gFreqOffset = *reinterpret_cast<DWORD *>(inRemoteInfo->UserData);
        std::cout << "Adjusting Beep frequency by: " << gFreqOffset << "\n";
    }
 
    // Perform hooking
    HOOK_TRACE_INFO hHook = { NULL }; // keep track of our hook
 
    std::cout << "\n";
    std::cout << "Win32 Beep found at address: " << GetProcAddress(GetModuleHandle(TEXT("kernel32")), "Beep") << "\n";
 
    // Install the hook
    NTSTATUS result=0;
    result = LhInstallHook(GetProcAddress(GetModuleHandle(TEXT("kernel32")), "Beep"), myBeepHook, NULL, &hHook);
    if (FAILED(result))
    {
        std::wstring s(RtlGetLastErrorString());
        std::wcout << "Failed to install hook: ";
        std::wcout << s;
    }
    else
    {
        std::cout << "Hook 'myBeepHook installed successfully.";
    }
 
    // If the threadId in the ACL is set to 0,
    // then internally EasyHook uses GetCurrentThreadId()
    ULONG ACLEntries[1] = { 0 };
 
    // Disable the hook for the provided threadIds, enable for all others
    LhSetExclusiveACL(ACLEntries, 1, &hHook);
 
    return;
}