Creates the logical Path for a file.
Role:Creates the logical Path of a file that will be use
by the CATIA files'soft. The resulting string will be interpreted by
calls such as CATFileInfo CATFileAccess etc...
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.
Returns:
Legal values:
S_OK : on Success
E_FAIL :on failure