Intercept reg query

[DicatoroftheUSA]

Question

1. Is there any way to intercept reg queries, for example, how sysinternals procmon is capable of showing them.

Scenario

I have a piece of a software that has a function triggered by a button, that was designed for XP that does not work with windows 7. Specifically it would switch the theme to high contrast.

I made a script for the switch, but I would like to get the button to work. The position of the button can change and has the same color pallet as other buttons, so easy detection options do not seem to work.

However when using procmon I can see reg keys that it attempts to query when the button is pressed. If I could detect when those keys are being queried, I could run the intended function.