Problem : BrowseForFolder returns "The system cannot find the file specified"

Hello all,

XPsp3

I have the need to select a file, and found "BrowseFolFolder" should be able 
to do it.

The problem is that no matter the path or the file selected, all I get is a 
"The system cannot find the file specified" error.

The stripped-down example :

- - - - - - - - - - - - - -
Set shell = CreateObject("Shell.Application")
call shell.BrowseForFolder(0, "Choose a file:", &H4000, "c:\")
- - - - - - - - - - - - - -

I do not see what might be going wrong here.  Help ?

Regards,
Rudy Wieser