When I write a function into any of the Excell objects in
VBA as follows:

Function Bird()
End Function

then type

=Bird()

into the spread sheet, it does not see the function.

When I debug the function, I get the following error
message:

Object library invalid or contains references to object
definitions that could not be found.

What is going on here? Isn't a function supposed to work
in the spreadsheet?

-cnb