Rebar Chevron Help

Someone who knows

how to use chevrons with a rebar control.


Thanks

What's a chevron?

First I'm constructing a form as same as Internet Explorer, but with different functionality. I made it with rebar and toolbar controls. When I´m resizing a toolbar at a midle of it, the toolbar make by default a button that contains the buttons hidden. That button that contains the other buttons hidden, windows call it chevrons.