Prevent files from being copied

Hello.

I have been looking how to prevent some files/folders from (only) being copied, but everywhere there is written that if user can read it, he can also copy it.

So, what i want to know is, if it's possible to write a program with autoit that prevents a folder/file from being copied. I mean people can read, see what's inside folder, but they must not be able to copy it.

Thanks.