Everybody is answering like that because you don't use the search function, the question has been asked million of times in a million different ways.
If you are to lazy to search the short answer atm YOU CAN'T and probably you won't be able to do it in a loooong time that's it
If you are to lazy to search the short answer atm YOU CAN'T and probably you won't be able to do it in a loooong time that's it