HOT Toolbar Buttons?

Can a toolbar button be made HOT or activated simply by hovering the mouse over it similar to the way Menus work (after the first one is selected)?

Thanks;
Doc

Not that I know of - short of 'Menu Buttons'. What purpose would such behavior server though? With Menu's, there's something to "see" as you hover over a menu item, then move on to another one... With buttons, they need to be clicked to actual do anything... so what are you looking to have happen when simply mousing over a regular toolbar button?

I have a two menu buttons on the top of my toolbar plus one at the bottom that are all menus and was thinking that it would be nice if they would just open with a mouse-over. I have seen this on a few other programs and is very slick.

Doc