The toolbox classes are:
mred:basic-mode% mred:mode% mred:scheme-mode% mred:scheme-interaction-mode% mred:edit% mred:frame-group% mred:match-cache% wx:object% wx:add-colour% wx:bitmap% wx:icon% wx:brush% wx:brush-list% wx:buffer-data% wx:buffer-data-class% wx:buffer-data-class-list% wx:clipboard% wx:clipboard-client% wx:colour% wx:colour-database% wx:colour-map% wx:cursor% wx:dc% wx:canvas-dc% wx:memory-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:keycode% wx:keymap% wx:media-admin% wx:canvas-media-admin% wx:media-snip-media-admin% wx:media-buffer% wx:media-edit% mred:connections-media-edit% mred:media-edit% mred:hyper-edit% mred:return-edit% mred:media-text-edit% mred:searching-edit% mred:info-edit% mred:clever-file-format-edit% mred:file-edit% mred:backup-autosave-edit% mred:console-edit% mred:transparent-io-edit% mred:scheme-mode-edit% wx:media-pasteboard% mred:connections-media-pasteboard% mred:pasteboard% mred:info-pasteboard% mred:file-pasteboard% mred:backup-autosave-pasteboard% mred:graph-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:menu% mred:menu% wx:menu-bar% mred:menu-bar% wx:meta-file% wx:mult-colour% wx:pen% wx:pen-list% wx:point% wx:snip% mred:node-snip% mred:snip% wx:image-snip% wx:media-snip% mred: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:window% wx:canvas% mred:canvas% mred:canvas-message% mred:testable-canvas% wx:media-canvas% mred:connections-media-canvas% mred:media-canvas% mred:keymap-canvas% mred:wrapping-canvas% mred:frame-title-canvas% mred:hyper-canvas% mred:one-line-canvas% mred:media-text-canvas% mred:wide-snip-canvas% mred:testable-media-canvas% wx:panel% mred:connections-panel% mred:panel% mred:horizontal-edit-panel% mred:horizontal-panel% mred:media-text% mred:media-multi-text% mred:single-panel% mred:vertical-edit-panel% mred:vertical-panel% mred:testable-panel% wx:dialog-box% mred:testable-dialog-box% mred:connections-dialog-box% mred:dialog-box% wx:frame% mred:testable-frame% mred:connections-frame% mred:frame% mred:empty-frame% mred:menu-frame% mred:standard-menus-frame% mred:simple-menu-frame% mred:pasteboard-frame% mred:pasteboard-info-frame% mred:pasteboard-info-file-frame% mred:searchable-frame% mred:hyper-basic-frame% mred:hyper-make-frame% mred:hyper-view-frame% mred:info-frame% mred:console-frame% mred:editor-frame% mred:info-file-frame% wx:item% wx:button% mred:button% mred:testable-button% wx:check-box% mred:check-box% mred:testable-check-box% wx:choice% mred:choice% mred:testable-choice% wx:gauge% mred:gauge% mred:testable-gauge% wx:list-box% mred:list-box% mred:testable-list-box% wx:message% mred:message% mred:testable-message% wx:radio-box% mred:radio-box% mred:testable-radio-box% wx:slider% mred:slider% mred:testable-slider% wx:text% mred:testable-text% mred:text% wx:multi-text% mred:multi-text% mred:testable-multi-text% wx:text-window% mred:testable-text-window% mred:text-window%