I think so...in other words it seems that what is being discussed is "addins" in the form of
additional controls that can be
added
into a project - (as these are usually in the form *.dll or *.ocx files).
I only have '97 on board and in all the help files etc in there the only "addins" mentioned in '97 appear to be almost defined as being of the form .xla.
I'm not trying to be pedantic here, as I realize that later versions of office can very well refer to additional controls simply as "addins" it's just that it was confusing me.