Thanks. I am thinking a lot about this recently. We will definitely support a scripting language, or rather several scripting languages. VBA won't be one of them, I think. I wouldn't want to create a language just for this. Maybe use a language like Lua or perhaps Rhai[0]. By design extending and embedding IronCalc should be very easy. Work in this direction will not start in the next 9 months though.

[0]: https://github.com/rhaiscript/rhai

Thank god for that, VBA gives me nightmares.

It would also be pretty interesting to see a modular system where we can run Python scripts as well