To answer your question, I do not have a control, when I start doing something I enjoy I do not stop. That is the reason that I do not gamble because I believe that prevention is better than cure. If I caught myself in the quicksand of gambling addiction, I have a plan. First thing that I should do is accept myself as addicted and tell my parents that I am addicted and they will help me in rehabilitating my addiction by cutting off the funds that I get from them and making sure that I always go home after school and blocking online gambling website in our Internet. I believe that if you can put your mind in to something then you can do it successfully.
This can work under someone else supervision like in your case are your parents which can restrict you all the tools that you can use to gamble with and keep an eye on you until lets say you have not gambled for a month.
The real problem with control is when you are an independent adult that controls everything for yourself.In this case if the situation goes out of control then it is almost sure that a lot of problems will arise in the near future.