Ok, you solve me many questions and gave me others hehehe, I know we can't talk about modifying apps in this forum, so I'll search more information about this topic in other forums
thanks for all the replies
PG: for those that are thinking that what I'm trying to do is stupid and I'm just a kiddie, don't think that, I'm studying computer systems so I need to know this in a closer future to graduate, everyday you can learn one more thing than yesterday
/ 
