What is inserted into applications to stop people autoclicking.

Question

In applications and games on social networking sites there are games where you can only click every 15 or 30 minutes for example, people playing the game sometimes use an autoclicker so they don't have to be at there computer constantly, developers then insert something so the player will click the button but then has too enter a three digit number or something like that, too make players not be able to play whilst absent from the computer, what is the technical name for this? and is there a way round it?

Answer 1

The name is a Capcha and there are ways to get around it. Some programs are able to decrypt the image and then enter the data but i dont know any nor do I know if its legal or not.