Prevent Alt+F4 from closing a specific program

I have a program (program 1) that goes dormant (not sure exactly what it is doing) when you run another program (program 2) from it (i.e. you go into program 1 and hit a button and program 2 launches, sending program 1 to the background). When you exit program 2, it brings program 1 out of dormancy. I am trying to use alt+F4 on a regular basis to close program 2 and bring program 1 back (this is from a controller). This used to work, but now hitting alt+F4 closes out program 1 first for some reason.

Is there a way to make a program (in this case my program 1) "immune" to alt+F4?

I never have any reason to use alt+F4 on this particular program, so I have no problem specifying somewhere "from this day forth, program 1 will never be alt+F4'ed!"

dalchina said:

In your case you'd need to start withAlt & F4::I believe.It's very quick to produce a tiny script and try it, then build on it.

So, I found out a software I am already running for a different purpose allows me to run a batch file with a defined hotkey press. I'd like to stick with this instead of using AutoHotKey since it's already up and running all the time anyway, so I just need a batch file that does the following (paraphrasing code below). I'm not sure how I would right the parts to identify the active window and decide whether to kill it:

@echo off

Omit_List = ["program1.exe","program2.exe",...]
Active_Program = <find active program window>

if "Active_Program is listed in Omit_List"
return
else
killtask /im Active_Program /F /T
end