How do I turn off Unicode in a VC++ project?

Burgos has the right answer. Just to clarify, the Character Set should be changed to "Not Set".

project properities -> configuration properities -> general -> charater set

Have you tried: Project Properties - General - Project Defaults - Character Set?

See answers in this question for the differences between "Use Multi-Byte Character Set" and "Not Set" options: About the "Character set" option in visual studio 2010