Ringworm is a fungal infection - I don't see how Program could help that. Are you sure that you aren't referring to Roundworm?
A blacklight only shows the ringworm as green in about 50% of the cases. This is not a definitive test. A culture is the only way to accurately diagnose it. Over the counter medications might be OK, but I would get a full treatment regime from your vet. You not only have to treat your cat, but your entire environment and possibly yourself. It is a very hardy fungus and not to be taken lightly.
Suggest you get to the vet for a diagnose. It could be a number of things, and you don't want to rule out infections, skin cancers, etc.
For a reference, here is a site that talks about ringworm.http://www.marvistavet.com/html/body_ringworm.html