Can't find reference NationalInstruments.visaNS - C#

Hello,

I have to control a monitor through an IEEE port. So I plugged the NI GPIB-USB-HS and I am trying to send commands to the port. I'm using Visual Studio 2010, .NET framework 4.0. I've installed NI 488.2 14.0.0 and NI VISA 14.0.0.

Now I would like to use the fonctions from NationalInstruments.VisaNS library, but I can't find the reference I have to add. I found a tutorial here :

http://www.ni.com/white-paper/2739/en/

But when I try to add a new reference in VS2010 :

Maybe I missed something ?

Thank you for your help !