I'm not the best for that job, but for sure it'll work.
No questions, seems it's completely clear: you need a support app for the software you're using, and probably need to improve that dummy function, for doing the best you need.
I only say that hooking external app window messages are need to be with winapi written in C. So, that forces you to need another api appart from dummy function, in the case you need to hook another textboxes, or who knows, another elements objects...
Good luck.