Originally Posted by ambuj.gupta 
Charming - you must have lots of spare time. Have you read "How to win friends and influence people"
The reason I'm not going to tell you is that, even if it is widely done and easily implemented into the firmware by several manufacturers, Toshiba in particular, it is decidedly dodgy legal territory. [Edit: Although apparently I am wrong in this understanding. My mistake.]
Seriously, though, Google it. If in doubt, Google it.