+\twocolitem{\helpref{wxPrintData}{wxprintdata}}{Represents information about the document being printed}
+\twocolitem{\helpref{wxPrintDialogData}{wxprintdialogdata}}{Represents information about the print dialog}
+\twocolitem{\helpref{wxPageSetupDialogData}{wxpagesetupdialogdata}}{Represents information about the page setup dialog}
+\end{twocollist}
+
+{\large {\bf Drag and drop and clipboard classes}}
+
+\overview{Drag and drop and clipboard overview}{wxdndoverview}
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxDataObject}{wxdataobject}}{Data object class}
+\twocolitem{\helpref{wxDataFormat}{wxdataformat}}{Represents a data format}
+\twocolitem{\helpref{wxTextDataObject}{wxtextdataobject}}{Text data object class}
+\twocolitem{\helpref{wxFileDataObject}{wxtextdataobject}}{File data object class}
+\twocolitem{\helpref{wxBitmapDataObject}{wxbitmapdataobject}}{Bitmap data object class}
+\twocolitem{\helpref{wxCustomDataObject}{wxcustomdataobject}}{Custom data object class}
+\twocolitem{\helpref{wxClipboard}{wxclipboard}}{Clipboard class}
+\twocolitem{\helpref{wxDropTarget}{wxdroptarget}}{Drop target class}
+\twocolitem{\helpref{wxFileDropTarget}{wxfiledroptarget}}{File drop target class}
+\twocolitem{\helpref{wxTextDropTarget}{wxtextdroptarget}}{Text drop target class}
+\twocolitem{\helpref{wxDropSource}{wxdropsource}}{Drop source class}
+\end{twocollist}
+
+{\large {\bf File related classes}}
+
+wxWidgets has several small classes to work with disk files, see \helpref{file classes
+overview}{wxfileoverview} for more details.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxFileName}{wxfilename}}{Operations with the file name and attributes}
+\twocolitem{\helpref{wxDir}{wxdir}}{Class for enumerating files/subdirectories.}
+\twocolitem{\helpref{wxDirTraverser}{wxdirtraverser}}{Class used together with wxDir for recursively enumerating the files/subdirectories}
+\twocolitem{\helpref{wxFile}{wxfile}}{Low-level file input/output class.}
+\twocolitem{\helpref{wxFFile}{wxffile}}{Another low-level file input/output class.}
+\twocolitem{\helpref{wxTempFile}{wxtempfile}}{Class to safely replace an existing file}
+\twocolitem{\helpref{wxTextFile}{wxtextfile}}{Class for working with text files as with arrays of lines}
+\end{twocollist}
+
+{\large {\bf Stream classes}}
+
+wxWidgets has its own set of stream classes, as an alternative to often buggy standard stream
+libraries, and to provide enhanced functionality.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxStreamBase}{wxstreambase}}{Stream base class}
+\twocolitem{\helpref{wxStreamBuffer}{wxstreambuffer}}{Stream buffer class}
+\twocolitem{\helpref{wxInputStream}{wxinputstream}}{Input stream class}
+\twocolitem{\helpref{wxOutputStream}{wxoutputstream}}{Output stream class}
+\twocolitem{\helpref{wxCountingOutputStream}{wxcountingoutputstream}}{Stream class for querying what size a stream would have.}
+\twocolitem{\helpref{wxFilterInputStream}{wxfilterinputstream}}{Filtered input stream class}
+\twocolitem{\helpref{wxFilterOutputStream}{wxfilteroutputstream}}{Filtered output stream class}
+\twocolitem{\helpref{wxBufferedInputStream}{wxbufferedinputstream}}{Buffered input stream class}
+\twocolitem{\helpref{wxBufferedOutputStream}{wxbufferedoutputstream}}{Buffered output stream class}
+\twocolitem{\helpref{wxMemoryInputStream}{wxmeminputstream}}{Memory input stream class}
+\twocolitem{\helpref{wxMemoryOutputStream}{wxmemoutputstream}}{Memory output stream class}
+\twocolitem{\helpref{wxDataInputStream}{wxdatainputstream}}{Platform-independent binary data input stream class}
+\twocolitem{\helpref{wxDataOutputStream}{wxdataoutputstream}}{Platform-independent binary data output stream class}
+\twocolitem{\helpref{wxTextInputStream}{wxtextinputstream}}{Platform-independent text data input stream class}
+\twocolitem{\helpref{wxTextOutputStream}{wxtextoutputstream}}{Platform-independent text data output stream class}
+\twocolitem{\helpref{wxFileInputStream}{wxfileinputstream}}{File input stream class}
+\twocolitem{\helpref{wxFileOutputStream}{wxfileoutputstream}}{File output stream class}
+\twocolitem{\helpref{wxFFileInputStream}{wxffileinputstream}}{Another file input stream class}
+\twocolitem{\helpref{wxFFileOutputStream}{wxffileoutputstream}}{Another file output stream class}
+\twocolitem{\helpref{wxZlibInputStream}{wxzlibinputstream}}{Zlib (compression) input stream class}
+\twocolitem{\helpref{wxZlibOutputStream}{wxzliboutputstream}}{Zlib (compression) output stream class}
+\twocolitem{\helpref{wxZipInputStream}{wxzipinputstream}}{Input stream for reading from ZIP archives}
+\twocolitem{\helpref{wxSocketInputStream}{wxsocketinputstream}}{Socket input stream class}
+\twocolitem{\helpref{wxSocketOutputStream}{wxsocketoutputstream}}{Socket output stream class}
+\end{twocollist}
+
+{\large {\bf Threading classes}}
+
+\overview{Multithreading overview}{wxthreadoverview}
+
+wxWidgets provides a set of classes to make use of the native thread
+capabilities of the various platforms.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxThread}{wxthread}}{Thread class}
+\twocolitem{\helpref{wxThreadHelper}{wxthreadhelper}}{Manages background threads easily}
+\twocolitem{\helpref{wxMutex}{wxmutex}}{Mutex class}
+\twocolitem{\helpref{wxMutexLocker}{wxmutexlocker}}{Mutex locker utility class}
+\twocolitem{\helpref{wxCriticalSection}{wxcriticalsection}}{Critical section class}
+\twocolitem{\helpref{wxCriticalSectionLocker}{wxcriticalsectionlocker}}{Critical section locker utility class}
+\twocolitem{\helpref{wxCondition}{wxcondition}}{Condition class}
+\twocolitem{\helpref{wxSemaphore}{wxsemaphore}}{Semaphore class}
+\end{twocollist}
+
+{\large {\bf HTML classes}}
+
+wxWidgets provides a set of classes to display text in HTML format. These
+class include a help system based on the HTML widget.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxHtmlHelpController}{wxhtmlhelpcontroller}}{HTML help controller class}
+\twocolitem{\helpref{wxHtmlWindow}{wxhtmlwindow}}{HTML window class}
+\twocolitem{\helpref{wxHtmlEasyPrinting}{wxhtmleasyprinting}}{Simple class for printing HTML}
+\twocolitem{\helpref{wxHtmlPrintout}{wxhtmlprintout}}{Generic HTML wxPrintout class}
+\twocolitem{\helpref{wxHtmlParser}{wxhtmlparser}}{Generic HTML parser class}
+\twocolitem{\helpref{wxHtmlTagHandler}{wxhtmltaghandler}}{HTML tag handler, pluginable into wxHtmlParser}
+\twocolitem{\helpref{wxHtmlWinParser}{wxhtmlwinparser}}{HTML parser class for wxHtmlWindow}
+\twocolitem{\helpref{wxHtmlWinTagHandler}{wxhtmlwintaghandler}}{HTML tag handler, pluginable into wxHtmlWinParser}
+\end{twocollist}
+
+{\large {\bf Virtual file system classes}}
+
+wxWidgets provides a set of classes that implement an extensible virtual file system,
+used internally by the HTML classes.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxFSFile}{wxfsfile}}{Represents a file in the virtual file system}
+\twocolitem{\helpref{wxFileSystem}{wxfilesystem}}{Main interface for the virtual file system}
+\twocolitem{\helpref{wxFileSystemHandler}{wxfilesystemhandler}}{Class used to announce file system type}
+\end{twocollist}
+
+{\large {\bf XML-based resource system classes}}
+
+\overview{XML-based resource system overview}{xrcoverview}
+
+Resources allow your application to create controls and other user interface elements
+from specifications stored in an XML format.
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxXmlResource}{wxxmlresource}}{The main class for working with resources.}
+\twocolitem{\helpref{wxXmlResourceHandler}{wxxmlresourcehandler}}{The base class for XML resource handlers.}
+\end{twocollist}
+
+{\large {\bf Online help}}
+
+\twocolwidtha{6cm}
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxHelpController}{wxhelpcontroller}}{Family of classes for controlling help windows}
+\twocolitem{\helpref{wxHtmlHelpController}{wxhtmlhelpcontroller}}{HTML help controller class}
+\twocolitem{\helpref{wxContextHelp}{wxcontexthelp}}{Class to put application into context-sensitive help mode}
+\twocolitem{\helpref{wxContextHelpButton}{wxcontexthelpbutton}}{Button class for putting application into context-sensitive help mode}
+\twocolitem{\helpref{wxHelpProvider}{wxhelpprovider}}{Abstract class for context-sensitive help provision}
+\twocolitem{\helpref{wxSimpleHelpProvider}{wxsimplehelpprovider}}{Class for simple context-sensitive help provision}
+\twocolitem{\helpref{wxHelpControllerHelpProvider}{wxhelpcontrollerhelpprovider}}{Class for context-sensitive help provision via a help controller}
+\twocolitem{\helpref{wxToolTip}{wxtooltip}}{Class implementing tooltips}