How to link *.dll about third party library?

I try to add OpenCV to ue4 third party.

Engine\Binaries\ThirdParty\OpenCV\Win64\VS2013
has *.dll

Engine\Source\ThirdParty\OpenCV\lib\Win64\VS2013
has *.dll and *.lib

but why ue4 always forgets loading the dll?

What Should I do?

this is my build cs file
link text

I need use boost library, anyone help?

I compiled finish

linked is ok

just runtime error

is that 32bit or 64bit libraries?

all is 64bit

I believe the problem is that you don’t have the build script (module script) linked to your project so the build file is not loaded at all.

Also i recommend reading this article:
https://docs.unrealengine.com/latest/INT/Programming/UnrealBuildSystem/index.html