How do I add a Library to the linker?

I am trying to build Unreal Engine/NVidia Funhouse Project.
Most of the builds succeeded but some of them failed all with LNK2019 erros like this one:

Error	LNK2019	unresolved external symbol NvAPI_D3D11_CreateGeometryShaderEx_2 referenced in function

I believe that this is because i did not set nvapi.lib in the linker as explained on these 2 places:

So I right clicked on the UE4 project, then I opened the properties menu, and tried to find the place in visual studio to add the library as in this example.

But I don’t have most of those menus.

All I have in my project are:

VC++ Directories

Screenshot attached. Can anyone tell me where I can find the linker or how I can add NVApi.lib


Learn to use the UBT system.
You won’t be able to load a lib in Unreal through visual studio, you need proper C# code inside a Build.cs file for that.

Thank You! I would really like to learn more about UBT and working with Build.cs files. Could you point me to the best resource to study this?
I took a quick look at the project and

I found this NVAPI.Build.cs file under C:\Users\Colorado\Desktop\UnrealEngine-VRFunhouse-4.11\Engine\Source\ThirdParty\NVIDIA
here is what it says:

// Copyright 1998-2016 Epic Games, Inc. All Rights Reserved.
using UnrealBuildTool;

public class NVAPI : ModuleRules
    public NVAPI(TargetInfo Target)
		Type = ModuleType.External;

        string nvApiPath = UEBuildConfiguration.UEThirdPartySourceDirectory + "NVIDIA/nvapi/";

		if (Target.Platform == UnrealTargetPlatform.Win64)
            string nvApiLibPath = nvApiPath + "amd64/";
		else if (Target.Platform == UnrealTargetPlatform.Win32)
            string nvApiLibPath = nvApiPath + "x86/";


I confirmed that those files do exist on those paths.
Does this mean that the linker is in fact properly configured to include nvapi.lib?


Linker problem solved

OK I got all the compiler errors to disappear. And thank you Bruno for your input it was very helpful in showing me the root of the problem.
For some reason, I needed to manually replace the nvapi.lib file after the setup was complete
as described by GalaxyMan2015 in this thread

Following those instructions that got rid of all of the LNK2019 build errors.

I would like to learn more about how UBT works if you could point me in the right direction for the best documentation it would be greatly appreciated.

I don’t know of any docs about this; we are all in the dark, what I do is read through the Builder Tool module in engine source and go lurking inside of plugins that are published by default in Engine/Plugins folder.

I just signed in and am posting for the first time ever in UE forums to say Thank You!
I just started messing with UE4 the other day and was not able to figure this out until I found this thread.
My project now builds after recopying the Engine/Source/ThirdParty/NVIDIA/nvapi directory.

I’m not sure if it was the cause, but I specifically cloned the funhouse branch directly, instead of the whole repo.

git checkout --branch VRFunhouse-4.11

Regardless, I’m now successfully building VR Funhouse project version 4.11 with VS2013.
Much obliged! :smiley: