Prevent forms from closing

[CalzzOne]

I have a Windows 7 laptop and I usually take it with me at school and many of my friends (maybe accidentally) close my applications. I happen to use Chrome, Photoshop, Lightroom, etc and I want them to be unable to close them (or even tabs, I know it's difficult to make this). I find useful to create a background app, some process to be closed/stopped before closing a form, or simply an ugly Mesage Box.
I'm familiar with .NET but a beginner in Windows API. Waiting for your answer.

[ThatThatGuy]

You can't stop that..
What you can do is create a new login apart from your login..
and allow them to use that login.

Assign restrictive privileges to that account