How to encrypt folder in Windows?

I have a program in C++ that stores c开发者_StackOverflow中文版ertain files such as movies, mp3 & Flash in the AppData folder. The issue is that whilst generally hidden, the user can easily visit this folder and take any of these files.

Is there a way that the program can encrypt this folder so that it's not possible for the user to access the files (except through the software itself)?

Any other solutions (even if not related to the above) are much appreciated.

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You can use your own program to encrypt a file or a folder.However you can use open source software like truecrypt.The software along with the code is available.Code is written in C,C++ and assembly

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Why not simply encrypt the files and then decrypt them when they are loaded by the app. That way it does not matter if the user can access the files.