so i created a small test app on windows. and i want to change the file extension, and i guess encrypt it? i dont know. anyway, i want to be able to make another application that can open these encrypted files, with the custom extension. i dont want it just view the files, but say it was a game, using the "emulator" would play the file automatically. im sure its not easy, but thats why im asking. im also wondering if the whole encryption thing is possible, so that people cant just easily right click on the file, to view the internals or whatever. kind of like, i guess an nes rom, cant just be opened so you can see all the files... its encrypted, and it has some extension like .nes, then if you open it with an nes emulator on any device, it will play the game. i guess it decrypts then starts the game? im wondering if i can achieve something similar to this: an app that starts an encrypted application.