Updated the previous post to show a dummy SketchupExtension registrar script.
(There was also a dummy example in the API docs, I linked you to.)
MAKE sure to read:
SketchUp API: SketchupExtension class
and
Extension Warehouse Developer Best Practices (Technical Requirements section)
I would prefer you read the old “Pick-Axe” Ruby book, and it’s chapter on Mixin Modules. I posted it in the “Ruby Resources” thread:
And the Ruby Core primer …