How to convert DOS file path to usable driver format?

I saw that drivers use GLOBALROOT etc in kernel mode. How can i convert a DOS file path into this version? I am not sure of how to convert a regular DOS path into something like this.

In other words i have a file system filter and I want to convert it to a DOS path or convert a DOS path into a usable format which I can compare with my file system filter. Is there any api there i can use?

Aside from the double post, you probably want this post in the NTFSD forum… where people who work with file systems and file system filters hang out…

Peter