How to add an ACE for integrity level to ACL?

I'm trying to add an ACE in the ACL when creating a named pipe. I find that there is a new API AddMandatoryAce() in the header file, however, it looks like that this API is not documented anywhere. MS folks, please, share your knowledge about this API or update the document. Thanks! Anyone else who has info about it from whatever resource, please share! Thanks!

[371 byte] By [maryz] at [2007-12-22]