在虚幻引擎4中使用Steamworks

Question

So I've started implementing Steamworks functions for my game, and everything went perfectly fine. I managed to get sync with steam API ( i can do achievements and see that i'm playing game on my steam acc). However when i wanted to start using some functions that they provided, my engine is saying:

error LNK2019: unresolved external symbol

Anyone can help me solve this problem? I'm aiming atm at reading and saving score in Leaderboards. Any good advices for me ? :D

Code sample that gives me error:

    int MyCodeLibrary::TryGetScore()
{
    if (SteamAPI_Init())
    {
        CSteamLeaderboards obj();
        obj().FindLeaderboard("test");
        obj().DownloadScores();
        return 0;
    }
    else
    {
        return 0;
    }
}

Also tried to get to Steam with OnlineSubsystem like this:

void MyCodeLibrary::UpdateScoreInt(int score, FName board, APlayerController* PlayerController)
{
    OutputDebugStringA("Funkcja jest wywoływana");
    if (SteamAPI_Init())
    {
        OutputDebugStringA("Steam API działa");
        ULocalPlayer* LocalPlayer = Cast<ULocalPlayer>(PlayerController->Player);
        IOnlineSubsystem* ion = IOnlineSubsystem::Get(FName("Steam"));
        TSharedPtr<const FUniqueNetId> UserId = ion->GetIdentityInterface()->GetUniquePlayerId(LocalPlayer->GetControllerId());
        ion->GetLeaderboardsInterface();

        FOnlineLeaderboardWrite wrt;
        wrt.LeaderboardNames.Add(board);
        wrt.SetIntStat(TEXT("Score"), score);

        if (UserId.IsValid())
        {
            OutputDebugStringA("Mam UserID");
            ion->GetLeaderboardsInterface()->WriteLeaderboards(board, *UserId, wrt);
            printf("Odpalony score");
        }

    }
}

Answer 1

So, I've included library "steam_api64.lib" in my source, but after that i've recieved lots of error which suggest that everyting in steam_api.h is wrong :/

I'm pretty new to it, so would appreciate some furthere help with it. Here are examples of errors showing:

error C2371: "S_CALLTYPE": redefinition; different basic types

error C4430: missing type specifier-int assumed. Note C++ does not support default-int

Did I included anything wrong or missing something? Steam_api.h file is downloaded directly from steamworks and has not been modified.