Thanks Colin,
I only work on personal files, I don't sell or redistribute them.
I do this to try and get my brain working. Also, given my age, I no longer feel like investing in paid software.
Thanks to you, I've managed to improve my functions and in my Add-in, I've put in the module header, the lines for inserting errors, the numbering and unnumbering of functions, everything that's currently useful to me.
I don't dare put the Add-In's work on the forum, because I don't think I'm up to Carlos Quintero's level.