>Since there are so many variations on the theme "Listbox" most users are not able to see the difference. Hell, even for developers its difficult to draw the line between the two. Your argument does not carry much value to me. The GUI of a control must be intuitive no matter whether its implemented with a Listbox or Grid.

We need to remember the definition of intuitive. For most of the GUI stuff, that means "similar to what the user already knows how to do". And we just assume it's a user who is accustomed to windowses - so, it should look and work pretty much the same as it does in other windows apps.

But there has to be innovation, or else we'd be stuck with W3.1 GUI forever. Speaking of listboxes - the current file selector dialog in W7 finally has checkboxes to the files if multiple selection is possible. Wow - it took them 20+ years to come up with that. Now imagine someone (like we once were) who meets the listbox for the first time. How is ctrl+click intuitive to a novice? How is "forget to hold ctrl, click and lose all the choices you already made" intuitive?

I'd stick with the definition of intuitive in which pretty much everything is OK unless it makes the user feel/look stupid.