New Post: How to include library in xaml/c++ project?

First of all, I'm a structure engineer trying to fumble my way through programming. So, please forgive me if my question is stupid.

I have an xaml/c++ metro project. When I try to download library... here are a couple of screenshots.

https://dl.dropboxusercontent.com/u/34225393/ploterror1.png

https://dl.dropboxusercontent.com/u/34225393/ploterror.png

I'm trying to create a user control that plots equations. What do I need to do to make this work?

Again, many apologies.