vbscript: how to generate a FolderItem2 object from a filename ?

Hello all,

I found a smal script which uses the "GetDetailsOf" method of a "Folder3" 
object to extract some properties of a file.

The thing is that the "GetDetailsOf" method expects a "FolderItem2" object 
as its first argument.

And although the "Folder3" object allows iterating thru its children by 
which it returns an "FolderItem2" object for each of its entries (files, 
subfolders), I would like to inspect just a single file.

So, I need a method to convert a (full) filename into a "FolderItem2" object 
(withor-without the aid of a "Folder3" object, which "GetDetailsOf" needs 
anyway).

Does what I'm looking for even exists ?  And if so, what does it look like ?

reference script:
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Set objDlg = WScript.CreateObject("Shell.Application")

'-- returns a Folder3 object
Set oNSFolder = objDlg.NameSpace(folderName)

'-- returns FolderItem2 objects
For Each oNSFile In oNSFolder.items

 '-- the "Artist" property value
  sProperty = oNSFolder.GetDetailsOf(oNSFile, 16)

  ...
next
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Regards,
Rudy Wieser