If you are creating a real application, rather than just playing you will need a project structure like this

Application main
Unit test main
Fitnesse test main - (the dll approach is currently not supported)
Application Library (one or more)

Your application will need compatible settings with CppTestTools. If the settings provided in CppTestTools is not what you want for your project, then change the settings in the CppTestTools projects. If you can live with CppTestTools settings, then change yours to match.