If I am in a year long program because I have a theft charge and now got an OWI, what's going to happen now?

When you say "year long program" I am assuming you mean some type of court ordered probation. If this is the case, then typically you are ordered not to violate any new criminal laws. If you do, then this could possibly violate your probation. Being charged with an OWI, a new criminal offense, can trigger a violation in which the judge could impose jail time, extend your probation, or increase your current probation conditions. My advice is to consult a local criminal defense attorney for your probation and OWI offense to help minimize any penal outcomes.