+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{cbAntiflickerPlugin}{cbantiflickerplugin}}{Double-buffering class}
+\twocolitem{\helpref{cbBarDragPlugin}{cbbardragplugin}}{Implements drag behaviour.}
+\twocolitem{\helpref{cbBarHintsPlugin}{cbbarhintsplugin}}{Implements bar decoration and sizing behaviour.}
+\twocolitem{\helpref{cbHintAnimationPlugin}{cbhintanimationplugin}}{Draws animated hints when the user drags a pane.}
+\twocolitem{\helpref{cbPaneDrawPlugin}{cbpanedrawplugin}}{Implements most of MFC-style control bar implementation.}
+\twocolitem{\helpref{cbPluginBase}{cbpluginbase}}{Abstract base class for all control-bar related plugins.}
+\twocolitem{\helpref{cbRowDragPlugin}{cbrowdragplugin}}{Implements row-dragging functionality.}
+\twocolitem{\helpref{cbRowLayoutPlugin}{cbrowlayoutplugin}}{Implements row layout functionality.}
+\twocolitem{\helpref{cbSimpleCustomizationPlugin}{cbsimplecustomizationplugin}}{Enables customization of a bar.}
+\twocolitem{\helpref{cbBarSpy}{cbbarspy}}{Helper class used for spying for unhandled mouse events on control bars and forwarding them to the frame layout.}
+\end{twocollist}
+
+{\large {\bf Window classes}}
+
+Windows classes (note that the mini-button implementations are not true windows
+in that they do not derive from wxWindow).
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxToolWindow}{wxtoolwindow}}{A small frame that paints its own titlebar.}
+\twocolitem{\helpref{cbFloatedBarWindow}{cbfloatedbarwindow}}{A kind of wxToolWindow implementing floating windows.}
+\twocolitem{\helpref{cbMiniButton}{cbminibutton}}{Base class for wxToolWindow titlebar buttons.}
+\twocolitem{\helpref{cbCloseBox}{cbclosebox}}{Close button for wxToolWindow titlebar.}
+\twocolitem{\helpref{cbCollapseBox}{cbcollapsebox}}{Collapse button for wxToolWindow titlebar.}
+\twocolitem{\helpref{cbDockBox}{cbdockbox}}{Dock button for wxToolWindow titlebar.}
+\twocolitem{\helpref{cbCloseBox}{cbclosebox}}{Close button for wxToolWindow titlebar.}
+\twocolitem{\helpref{wxNewBitmapButton}{wxnewbitmapbutton}}{Alternative bitmap button class.}
+\end{twocollist}
+
+{\large {\bf Layout management classes}}
+
+These classes relate to the layout management framework.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{cbDockPane}{cbdockpane}}{Manages containment and control of bars in a prent frame.}
+\twocolitem{\helpref{BagLayout}{baglayout}}{BagLayout lays out items in left-to-right order from top to bottom.}
+\twocolitem{\helpref{cbUpdatesManagerBase}{cbupdatesmanagerbase}}{An abstract interface for display update optimization logic.}
+\twocolitem{\helpref{cbSimpleUpdatesMgr}{cbsimpleupdatesmgr}}{Implements optimized logic for refreshing areas of frame layout that need to be updated.}
+\twocolitem{\helpref{cbGCUpdatesMgr}{cbgcupdatesmgr}}{Implements optimized logic for refresh, based on a garbage collection algorithm.}
+\twocolitem{\helpref{GarbageCollector}{garbagecollector}}{A garbage collection algorithm for use in display refresh optimization.}
+\twocolitem{\helpref{wxFrameLayout}{wxframelayout}}{Manages containment and docking of control bars, which can be docked along the top, bottom, right, or left side of the parent frame.}
+\end{twocollist}
+
+{\large {\bf Event classes}}