It seems that there are a lot of people (including myself) who don’t know how to add addons in a blank Visual Studio project project.
Step1: create the same structure as the addon using filters then add existing files in the filter folders.
Step2: right click on the project to open the properties navigate to -> configuration properties -> c/c++ -> general -> additional include directories
Step3: edit additional include directories
Step4: add the folders from the addon. In this case src and libs.
You can find the paths in the install.xml file which is located in the addon folder.
Hope this helps
UPDATE: you need to set the include directories on every build configuration debug/release