I need some expert advice. I need to write a VSTO addin for Excel that would need to run in both 2007 and 2010 as well as the 32bit and 64bit versions of each.
From what I have read here - is this correct:
1. If I don't target unique API's to version 2010 - that VSTO should install, load and work in 2007? Is that correct?
2. If I compile for "any code" - then that same VSTO dll should work in both 32 aqbd 64? No? Or will I still need a separate install for both?
Thanks in advance