Open DLL in Unity3D

[Roman500]

I wanted to use ZXing library and website says, that:

The following demo clients are
available:

-Unity3D and Vuforia demo (demonstrates encoding of barcodes and
decoding of images from a camera with
Unity3D)

I downloaded it, and it just a bunch of DLL files:

How do I run it in unity? This is supposed to be some sort of sample or demo, because demos for other platforms, like windows, contain .EXE files.

[tanoshimi]

Simply drag the DLLs into the plugins folder of your project.

Unity - Manual: Plug-ins