aligning label strings

[Marc Santhoff <M Santhoff t-online de>]

Hi,

I'm trying to put the strings of several equally sized buttons in a one
row table in a special way:

------------------------------------------
|  F1 - first string                     |
------------------------------------------
|  F2 - something completely different   |
------------------------------------------ 
|  F3 - ...                              |
------------------------------------------

The problem for me is to deal with strings having arbitrary lengths not
know until creation of this buttons.

What GUI structure and alignment settings would make ensure these Labels
are appearing left aligned in a row (maybe being centered by the longest
string)?

TIA,
Marc