How to restrict user to take print of website

Hello,

I want to restrict users to take print out of my website (different pages of site) from any Browser. Let me know how can I do that...?

Thanks in Advance!!!

 That's not possible. If they can see it on their screen they can take a screen shot.

 I understand they can take the screen shot of the page, but I want to restrict the user to take the print from Print Command (Print command should be blocked on site...).