I am working on quite a tedious project right now. It involves 10 years old, quite extensive, Visual Basic 6 programs. No source control was used. In our company it is practice to hire interns for 3-month periods to work on production software. A mix of programming styles can be found in this project. Some functions return 0 when they fail. Others return 1. Or -1. Or False. Or "False". I love it!