VBA/iLogic editor
For me I started just with the ilogic straight in the rule editor, then VBA in excel, then figured out how to change VBA rules to work in ilogic editor. All mostly working backwards from finished rules and finding out what piece of code does what.
Here is a good explanation of what some of the languages do.
https://forums.autodesk.com/t5/inventor-customization/ilogic-vs-vba-similarities-differences-and-adv...
I suppose because VB.NET is the most compatible with ilogic so it may be easier. But VBA is probably more commonly used in terms of content creation and debugging.
For learning solely inventor the API help has the best information and has samples that pop up on this forum where user start to modify based on specific needs. For me I spent many months hearing about The API help but actually couldn’t figure out where it was referenced, it is here.
https://knowledge.autodesk.com/support/inventor-products/learn-explore/caas/sfdcarticles/sfdcarticle...
Navigating it is a whole other ball game.
It uses VBA as its basis for sample codes. But if you are able to define the keywords you need you will be able to connect the snippets. I would generally just search for words that appear in the user interface as you are most likely looking to automate a manual process.
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Regards
Alan