oObject = CREATEOBJECT("IDAuto.PDF417.1")>Let's try other way. In the Object Browser copy GUID for that COM object into clipboard. Start Regit and search HKEY_CLASSES_ROOT for that GUID. ProgId under that key should give you name you're looking for.
oObject = CREATEOBJECT("PDF417LIB.PDF") >>>* or >>>oObject = CREATEOBJECT("PDF417LIB.PDF.1") >>>* but not >>>oObject = CREATEOBJECT("PDF471LIB.PDF")>>>