Using this thread... could someone tell me if it is possible to define many Default buttons, one per tab?

I have something like that:

Code:
  button "Add", 7, 112 40 20 10, flat default tab 1
  button "Add", 14, 112 40 20 10, flat default tab 2


And so on... but it doesn't seem to work, I only get the first button like default, ignoring the rest of declarations. Any idea?

Thanx!

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Abstraction is art.