Disabling keys for password screen

[ironfistchamp]

Hey this must be an age old question but I would like to know how to disable or "catch" certain windows shortcuts.

I am making my own style lock feature as a kind of project. I have the project all done apart from the fact people can just close it with Alt+F4 or just bring up the task manager.

I think I need to do something with hooks? Am I correct? If I am how do you go about using one. If not then what do I need?

Thanks for any feedback

Ironfistchamp