Using Bessel in Macro

Hi
I am trying to use add-in function bessel in macro for calc. But it always shows “function procedure not defined”.
(I tried in BESSELI(1;2) in calc directly, and it works. )

See an example how to use Calc functions in a macro here Can we use regular spreadsheet functions in Basic functions? - #2 by Regina

It works! Thanks Regina!
cheers!