Generally speaking several applications have a protection implemented into one of its Dlls. This is the case for example of out-of-the-shelf protectors used by developers, such as TimeLock, for which the protection checks are implemented into protected Dlls, stored in the Windows’ system32 folder. In other cases the application itself is an add-on or a plug-in of another application, so usually a Dll. Finally there are also situations where protection resides into a Dll for specific design reasons.