FRN to path name

[Cristi BODNARIUC]

Hi,

In the document "Keeping an Eye on Your NTFS Drives, Part II: Building
a Change Journal Application"
(http://www.microsoft.com/msj/1099/journal2/journal2.aspx) is said
that the application must maintain the directory database, but also
that:

"Developers familiar with the Windows 2000 DDK may be aware of kernel
mode APIs or undocumented NTDLL APIs that will convert FRNs to path
names directly"

Do you know how/where to get some info for how to use these APIs?

Thanks a lot,
Cristi