Is anyone using file system password APIs?

Question for WM developers:

Are any of you using the File System Password APIs? If so, can you briefly describe how you're using them, what type of application it is, how long you've used these functions etc? I'd like to discuss some compatibility issues with you (offline), so if you've used these functions please either comment on this post or contact me by email: melsam [at] microsoft.com.

Thanks