Retrieves the physical path for a file.
Role:Retrieves the physical path of a file from a logical path
that has been previously constructed by CATMakeLogicalPath.
This method should not be used by application and will probably be defined
in PrivateInterfaces.
Parameters:
iDLName
the logical name.
iFileName
the file's name. Null in order to make the DLPath for a directory
oLogicalPath
the logical path of the file.
oReserved
not to be used. Reserved for internal use.
Returns:
Legal values:
S_OK : on Success
E_FAIL :on failure