The toolbox classes are:
mred:basic-mode%
mred:mode%
mred:scheme-mode%
mred:scheme-interaction-mode%
mred:buffer-group%
mred:frame-group%
mred:project-frame-group%
mred:match-cache%
wx:object%
wx:add-colour%
wx:bitmap%
wx:brush%
wx:brush-list%
wx:buffer-data%
wx:buffer-data-class%
wx:buffer-data-class-list%
wx:client%
wx:clipboard%
wx:clipboard-client%
wx:colour%
wx:colour-database%
wx:colour-map%
wx:connection%
wx:cursor%
wx:dc%
wx:canvas-dc%
wx:screen-dc%
wx:meta-file-dc%
wx:post-script-dc%
wx:printer-dc%
wx:event%
wx:command-event%
wx:key-event%
wx:mouse-event%
wx:font%
wx:font-list%
wx:font-name-directory%
wx:icon%
wx:keycode%
wx:keymap%
wx:media-admin%
wx:media-buffer%
wx:media-edit%
mred:edit%
mred:console-edit%
mred:hyper-edit%
mred:scheme-mode-edit%
wx:media-pasteboard%
mred:pasteboard%
wx:media-stream-in%
wx:media-stream-in-base%
wx:media-stream-in-string-base%
wx:media-stream-out%
wx:media-stream-out-base%
wx:media-stream-out-string-base%
wx:media-wordbreak-map%
wx:memory-dc%
wx:menu%
mred:menu%
wx:menu-bar%
mred:menu-bar%
wx:meta-file%
wx:mult-colour%
wx:pen%
wx:pen-list%
wx:point%
wx:server%
wx:snip%
wx:image-snip%
wx:media-snip%
wx:text-snip%
wx:tab-snip%
wx:snip-admin%
wx:snip-class%
wx:snip-class-list%
wx:style%
wx:style-delta%
wx:style-list%
wx:timer%
wx:tool-bar-tool%
wx:window%
wx:canvas%
mred:canvas%
wx:media-canvas%
mred:media-canvas%
mred:editor-canvas%
mred:simple-frame-canvas%
mred:hyper-canvas%
wx:panel%
mred:panel%
mred:horizontal-panel%
mred:single-panel%
mred:vertical-panel%
wx:dialog-box%
mred:dialog-box%
wx:tool-bar%
wx:button-bar%
wx:frame%
mred:frame%
mred:empty-frame%
mred:menu-frame%
mred:project-frame%
mred:standard-menus-frame%
mred:simple-menu-frame%
mred:console-frame%
mred:editor-frame%
mred:pasteboard-frame%
mred:hyper-basic-frame%
mred:hyper-make-frame%
mred:hyper-view-frame%
wx:item%
wx:button%
mred:button%
wx:check-box%
mred:check-box%
wx:choice%
mred:choice%
wx:gauge%
mred:gauge%
wx:group-box%
wx:list-box%
mred:list-box%
wx:message%
mred:message%
wx:radio-box%
mred:radio-box%
wx:slider%
mred:slider%
wx:text%
mred:text%
wx:multi-text%
mred:multi-text%
wx:text-window%
mred:text-window%