@alcinnz Seems the web isn't overflowing with info on VisualAge stuff. But I've been able to dig up a few references.

First, it seems it has been continued as the VAST Platform by Instantiations:
#^https://www.instantiations.com/vast-platform/

They have some docs on their website:
#^https://www.instantiations.com/vast-support/documentation/1301/#page/ug/vaug01.html

I also found a quite a bit by searching for VisualAge on the Internet Archive. Some of the more interesting ones I think are these:

• VisualAge for C++ - Visual Programmers Handbook
• IBM Visual Age C++ for OS/2 - Visual Builder User’s Guide
• IBM Visual Age C++ for OS/2 - Building VisualAge C++ Parts for Fun and Profit

These are, as you can see, for the C++ version, but the visual builder parts was similar. It was just more elegant with Smalltalk as you didn't need a compile cycle, and the language lends itself better to this type of dynamic coding.

Hope that helps.