Running Applications in background

I was wondering, is there a way to make an application run in background.

let's say for example, I managed to install cain and abel on my college's labs, and then I decided to arp-spoof the network and leave it running even after I left the lab.

But of course, someone from an admin to maybe a student who happened to be using the computer might notice it and then close it or find who was running the program.

So I did a google search and so far all I found was some code examples and some scripts, is there anyway for me to run the program in the background (which means that the program has to be invisible for the user) and after I made it run in the background, is there a way for me to be able to see the program again?

There are programs you can use to hide and unhide any application that is running in windows