how to GET groupPath (or groupPath hierarchy) via COM API?

Hi there,

I am using the COM API and can get targets, files, etc successfully.

However I have problems, to get the groupPath of a file or better to 
get the whole groupPath hierarchy.

What is the correct API in COM for getting the groupPath of a file ? 
(or what workaround can I use ?) ?


I have seen groupPath as input argument for several API methods, e.g. 
AddFile, AddFile2 etc.
usese groupPath as separate input parameter.
The question is now: How can I get back the information about 
groupPath ?


thanks ,
Bernhard.