How to add Boost library to an Unreal Engine 4 project (visual studio 2013)

I think you can simply drop boost into your game project directory (preferably in a sub-directory called boost) and you should be able to start using it after that.

May I ask what exactly you intend to use from boost, UE4 may already provide the facilities you’re looking for.

You can’t modify the project file directly; after adding new code, you must regenerate your game project file. (Right click on the uproject and Generate Project Files.

https://docs.unrealengine.com/latest/INT/Programming/UnrealBuildSystem/ProjectFileGenerator/index.html