Hey, not only can we not help you with this because of forum rules and the obvious link to reverse engineering programs. But it can't simply be done... So onto another solution, what is the program? (If it's open source that's the best place to start) are there any alternatives? And have you tried asking the developers? (if it's small-scale)...
Also using something like
SysInternals: ZoomIt to help you read items on the page is definately worth trying(it helped me a lot, my vision is little to be desired).
There are also certain programs which brag the ability to modify windows on the fly, in basic things like this(the disadvantage being you'd need to do this every time you use the program), if you like i'll look them back up... I thought Showin might be able to do it but it can't. So post back and i'll go looking again.
Cheers,
Jamey