How do i prevent from printscreen of my webpage? [duplicate]

Possible Duplicate:
Taking screenshot of a webpage programmatically
How can i disable print screen for a web page in all browser

Is there any possibilities to prevent printscreen for a webpage?if yes how can i do this help me ..how can i do that?.

Thanks Ravichandran

There is no way that you can stop a client machine from being able to print screen.

As the old hacker proverb says, if the information can be read, it can be copied.

There is no way to prevent Print Screen.

You will never be able to prevent users from copying content off your website. What is displayed on the users monitor can be print screen'd, whatever you try to do. All effords will only decrease usability, but won't prevent copying.