Why is Visual Studio 2008 always rebuilding my whole project?

Question

I have a Visual Studio project with about 60 C++ source files. I can do a build, and it completes without errors. But if I immediately hit F7 again, it always re-compiles about

Answer 1

Check your project includes any .h header file that doesn't exist on disk. Always happens to me when I delete a header file I'm not actually including anywhere, but forget to delete it from my solution navigator in VS. Note: missing headers produce no errors during the build (when not #included anywhere).