I'm working on ensuring compatibility with some legacy applications. I
need an API function that maps a (possibly virtual) path into a
physical path.

For example,

c:\program files\foo\download ---> c:\users\myusername\appdata\local
\virtualstore\program files\foo\download

Does Vista provide an API for retreiving these mappings? Is there a
way to determine whether a given path is virtual of physical?

Thanks,
Scott