When I try to compile the default shuttlepb.cpp, it gives 64 errors, such as: 1>.\ShuttlePB.cpp(69) : error C2504: 'VESSEL3' : base class undefined. I already set it up for orbiter using the orbit hangar tutorial. What's wrong?
What tutorial? If it's from before 2011, it likely doesn't include setting up Orbiter property sheets properly, which are used by the stock examples.
To compile the examples you don't need to follow any complicated set up tutorials, but just set the path of OrbiterDir in inherited orbiterroot property sheet.