I found a free source CAd at
https://github.com/FreeCAD/FreeCAD
the version compiled is on https://www.freecadweb.org/wiki/Download
I am sure it can see insert on our application because is made on cpp
it can be compiled with Visual Studio 12 2013, Visual Studio 9 2008, Qt Creator
https://github.com/FreeCAD/FreeCAD
the version compiled is on https://www.freecadweb.org/wiki/Download
I am sure it can see insert on our application because is made on cpp
it can be compiled with Visual Studio 12 2013, Visual Studio 9 2008, Qt Creator
Since from 1991/1992 ( fw for clipper Rel. 14.4 - Momos)
I use : FiveWin for Harbour March-April 2024 - Harbour 3.2.0dev (harbour_bcc770_32_20240309) - Bcc7.70 - xMate ver. 1.15.3 - PellesC - mail: silvio[dot]falconi[at]gmail[dot]com
I use : FiveWin for Harbour March-April 2024 - Harbour 3.2.0dev (harbour_bcc770_32_20240309) - Bcc7.70 - xMate ver. 1.15.3 - PellesC - mail: silvio[dot]falconi[at]gmail[dot]com