You're probably thinking of Object Windows Library (OWL) [1], a C++ library that was available to both Turbo Pascal for Windows and Borland C++, and which was b

You're probably thinking of Object Windows Library (OWL) [1], a C++ library that was available to both Turbo Pascal for Windows and Borland C++, and which was briefly available for other platforms, including several Unix variants. Borland also had the older Turbo Vision toolkit, but that was for MS-DOS. OWL was designed a very similar class hiearchy. [1] https://en.wikipedia.org/wiki/Object_Windows_Library https://en.wikipedia.org/wiki/Object_Windows_Library