>これ使うには、BC++やBCBにある（あった？）オリジナルのOWLが必要ｗ

C++Builder 5 Companion Tools CD
Exclusive

Object Windows Library
Inprise/Borland
http://cc.codegear.com/partners/bcb5/exclusive/object_windows_library/index.html
This release of the Object Windows Library is based on the OWL 5.4 release
and is denoted as OWL 5.5.
It has been ported to Borland C++Builder 5 by Yura Bidus, author of OWLNExt.
It includes source code and debug and release libraries of, OWL, BIDS and OCF.