How to tell if a path is from an Active Directory redirected folder?

Question

I have My Documents folder redirected to some location on the server for a specific Active Directory user:

That folder is also assigned a drive letter for that user:

If I have an arbitrary path, say "R:\Documents\Some folder\Document1", how can I tell that it refers to a redirected location?

Answer 1

The only somewhat suitable way that I found so far is to call GetDriveType and check for DRIVE_REMOTE. If anyone finds a better way, please post it here.