Thanks Tom. I just read the article. This sentence

.....if you need to be able to automate Excel 95, Excel 97, Excel 2000,
and Excel 2002, you should use the type library for Excel 95
(XL5en32.olb) to maintain compatibility with all three versions.

is quite useful.

What I need is to find a way to distribute my application assuming that
the client may not have the object(s) installed (or the object is
missing) and assuming we all use the same Excel version.

Help....