Windowblinds skins it. It's called Toolbars in Windowblinds. A lot of Windowblinds skins use a custom toolbar, but if you want to use a different one, click on My Toolbars in the Windowblinds options.
Note, Wincustoize has a section for
Toolbar Icons. You can download and apply any of these by going in the My Toolbar options in the Windowblinds configuration.