[news.eclipse.platform.swt] refreshing a shell

[mattia.bargellini@xxxxxxxxx (mattia)]

Good Morning,
I search the net very much but I didn't find any answer to my question.

I have a shell with 2 combos and other widgets, such buttons and labels:

when I select an element in the first combo, the shell should refresh 
itself (with all the component previously in it) loading some other values 
(depending on the value of the first selection) in the second combo.

This behaviour should be repeated every time the user choose a different 
value in the first combo, until he pushes the ok button to go to the next 
shell.

I don't know how to do this thing, so any help (explanation and pieces of 
code should be the maximum) is very very very appreciate.

Regards,
mattia from Italy