Thank you for your time and attention, John. Let me recap to make sure I
understand.

I create a plugin.dll.
The CAD calls plugin.dll.
The plugin.dll starts up Squeak.
Squeak then uses FFI to connect to the running plugin.dll.
When the CAD invokes a command to plugin.dll, the plugin.dll passes it to
Squeak which then returns the answer via the plugin.dll. This can be
repeated indefinitely until program exit.

FYI, I plan to use C# .Net for plugin.dll.

All the best,
Aik-Siong Koh
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