wxruby users - Oct 2009 - AcceleratorTable to "tab" the formular & trapping signals from frame border buttons

Hi all,

I have two problems and I would be very happy if we could solve them.
Thanks in advance.

my first problem:
I want to realise a formular for user input that is able to switch the
activated TextCtrl (there are a few) by clicking "TAB". It is quiet
easy
to trap the Tab click but I have no idea how to handle the
"activation"
of the next TextCtrl.

Maybe the solution is simple but I don''t see it?! ;(
Code so far:

    acc_table = Wx::AcceleratorTable[
      [ Wx::ACCEL_NORMAL,   Wx::K_TAB, 8001 ] ]
    self.accelerator_table = acc_table
    evt_menu(8001) { puts "what to do?" }

my second problem:
how do I trap a signal from the window border icons - I don''t know how
it is called, I mean "minimize", "maximize" and
"exit" buttons in the
upper right corner?

If you want to see the whole project:
http://labdiary.sourceforge.net/

Help is always welcome.
Thank you very much!

Kind regards,
der Max