How Exactly Does Folder Lock Works?

Ok, I've just been wondering my brains out.

I know:
- You can make a directory attribute as "System" to prevent it from being shown normally from hidden files.
- You can change it's ACLs so that unauthorized users don't have access to it.
- You can also change its CLSID so that Explorer doesn't even recognize it as a directory.

But what exactly does Folder Lock do? The file is "moved" to some other location since it's size is no longer added - that's my guess. But I think there much more going on behind the scenes.

Any veteran can please comment on this issue?

Regards,
Nisheeth Barthwal

I don't know what "Folder Lock" is. Is that a utility?
Anyway, if you remove the appropriate rights from a folder, even explorer will not be able to view its contents or to calculate its size.

Folder Lock

Using the ACLs you can make that Folder Unaccessible to explorer, but what this app does is Remove it from there and some kind of logical drive appears as the locker. Is this some kinda device driver?

A file system driver, encryption software and the stealth mode is probably using a simple keyboard driver (or if they were lazy possibly a registry hack to add the shortcut key). The lock file can be configured to not be seen as a file any longer so it doesn't count toward space in the folder.

Thanks a ton for resurrecting my query. I get you though not fully. Sorry, but I didn't fully understand the concept of using a "keyboard driver" as a a "file system driver".
The concept, I however (I think), I do get. I need some kind of a Global Hook (like LL Keyboard/Mouse) to parse the Messages which Explorer uses to enumerate the directories/files.

Is there an example on the above mentioned topic, particularly using Windows API?