Thanks Rich,
I do not understand why the annoyed tone in your response.
I think I've been courteous and not a bit disrespectful towards any one.
Sorry about my lack of communication skills, English is not my native language.
And thank you very much for the confirmation that this cannot be done with G-code,
this is what Tweakie's answer implied and what I guessed from lot of reading
and googling. Just wanted to know if I had missed anything.
Fair point that ZERO button can do different things, I just used that as an example
to explain (poorly it seems) what it was I wanted to know.
Thanks again, Kusti