Sorry to hear your wife is struggling to use her arm/hand at work! A few suggestions that might help; keep in mind some of these get better with consistent use so try not to be to disappointed if they are not an "instant" relief.

Epsom Salt soaks (1-2cups per gallon of warm water)
Voltaren gel (prescription is needed for this)
Medicated Compound cream (also prescribed - this one works pretty quickly and continues to improve with regular use)
Lidoderm patches (placed along the nerve path above or before the location of pain and several can be worn at one time for up to 12 hours)
Mirror therapy (your PT can help with this)
massage therapy for neck and shoulders to keep muscles from tightening and causing further pain.

I would also recommend checking the ergonomic setup of her desk, monitor and keyboard to ensure these are not adding to her pain in any way.

Frequent breaks from computer work if this is something she can work out with her employer. Her doctor or PT person could also help in that area by requesting modifications to her work space and needed breaks.

I hope she is able to find something that helps. Keep in mind with RSD/CRPS nothing is 100% at best, most things only offer a small reduction in pain rather than total relief. It takes a ton of patience and diligence in order to find something that works.. don't give up!! Most importantly try to stay positive and keep the arm/hand/shoulder moving as much as possible.

Best of luck to you both,
Tessa