[Sigia-l] GUI elements

[Michal Smyk]

Hello,
this is my first post here, but I've been lurking for some months already,
and I think this might be the best place to ask my question ;)

Can anyone recommend some on-line summary of all existing GUI elements (like
drop-downs, multi-choice etc.) and what is their purpose, most frequent use?

Some time ago I saw a checkbox being used in tab's role, and I thought some
decent source of information to expose such nonsenses would be of great
value.

Best Regards