Maybe I have bitten off more then I can chew but I would really like to
get this where I want it to go.

I have an XLA addin I created. Works great (thanks to much help from
this board).
I can now give this XLA file to anyone in my team that needs it, to
give them the functions.

But I am trying to ALSO make this addin, automatically create a toolbar
icon, linked to the function I created. This seems to have brought me
into the world of Class Modules and Events... a world I know little
about, yet.

Part of my troubles (outside of not understanding the whole process) I
believe is that most examples I have seen are linked to a specific
workbook. My process will need to be run on hundreds of workbooks,
therefore I want it to all be 'application level'. The functions all
work now on any workbook I open, but I simply cannot get even a msgbox
to pop up when I open a new or existing workbook.

Could some kind soul, give me some example code of how to do this?
Keep in mind the moment you tell me "just create a workbook open
event", you have lost me.

TIA