changing the focus with TAB

[Thomas Bayen <tbayen bayen de>]

Hi,

I have many text entry widgets and buttons in my application. I want 
that the user can cycle through the most useful widgets with the TAB 
key. But I don't want all widgets to be cycled through.
How can I control the order of the widget cycling? Or do I really have 
to catch the 'move-focus' signal and do it all by myself?
Thomas