I'm programming several apps at one, and I find I'm using the same class files and includes in all apps.

For example, I have a file Character.cpp that contains the class Ccharacter. I'm using this file in all four apps, and I want to only have one copy that all four projects can reference. So I created a directory in the same level as the apps called "Shared Resources".

Problem is, my includes are now being confused because it can't find the files. I've tried going into configure project and adding the directory to the Additional Include Directories, but that doesn't make a difference.

What do you pros do?