Hello, im currently working on a small project Client login that works from a web forums so people use there forum Login To login to the client, only problem is, it is heavily faulty, you can just open up the Exe in an Assembly editor or anything of that kind change anything you like so you can make it work.

How may i prevent this from happening.

i have also seen Some programs not Even show up in a program called Assembly Explorer, How is this Accomplished?

Any help is Appreciated.