Importing Steam Community API in Unreal Engine

You don’t need to anything at all because UE4 supports multiple game online services out of the box (including SteamWorks) under common interface called OnlineSubsystem

https://docs.unrealengine.com/latest/INT/Programming/Online/index.html
https://docs.unrealengine.com/latest/INT/API/Runtime/OnlineSubsystem/IOnlineSubsystem/index.html
https://docs.unrealengine.com/latest/INT/API/Runtime/OnlineSubsystem/index.html

It let you support multiple online services using same code without much of modifications, it also let you use online services in blueprint too without need of C++. Documentation is kind of poor right now but here blueprint achivment example for stream:

UE4 APIs is design in the way so you don’t need to talk to system or external libraries, UE4 has wrappers for many things which improves portability and UE4 APIs are huge, lot of things that you can miss easily, so try to search first or else you might go harder way for no reason.

But for the future, if you really want to include external library here tutorial how to, UE4 use own build system UBT and don’t listen to VS configurations but build scripts (C# code you got in source directory):

So I have my Steamworks SDK imported in my Unreal Engine project. It builds, and on run, I get the Steam overlay. Great!

However, I am now trying to get the user’s friends list, which requires the Steam Community API, which is included in two files, ISteamFriends.h and ISteamUtils.h. I am trying to import those into an Actor class that I created to manage Steam communication, but Visual Studio doesn’t see the files and won’t build.

#include "GameFramework/Actor.h"
#include "Http.h"
#include "ISteamFriends.h"
#include "ISteamUtils.h"
#include "SteamEvents.generated.h"
...

This produces the errors:

error C1083: Cannot open include file ‘ISteamFriends.h’: No such file or directory

error C1083: Cannot open include file ‘ISteamUtils.h’: No such file or directory

Is there a specific directory path that I need to give it so that it can find these files? How can I get Visual Studio to find these files so that I can use the Community API?

For what it’s worth, I cried for a week trying to understand that DSFADFADSFing static libraries linking wiki page, and ended up writing GitHub - shadowmint/ue4-static-plugin: A sample static plugin for the unreal engine that imports a C++ and rust library and links them statically. as a general guide for how to link to any arbitrary external library.

Hope it helps!