I have an Add-In Workbook that contains userforms and code which is
referenced by other workbooks. This is my problem, I may have 4 workbooks
open referencing the add-in wbk. If all those workbooks close, but the Excel
application remains open, my add-in does not close. Is there a way to put
code in the add in wbk to check to see if any workbooks are referencing it
and if not close the add-in?

Thanks in Advance!
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Cheers,
Ryan