Evolution Computing supports the development of plug-ins
for FastCAD, EasyCAD, and our free CADView viewer with the
XP Toolkit (XP stands for eXtended Procedures - a name we've used
for plug-ins since 1985!). XPs may be deveoped in either
Microsoft Visual C 2005 or later, or Macro Assembler 6.11+.
The toolkit is free. The toolkit provides example programs, header files,
and link libraries for each of the supported products.