+{\large {\bf Drag and drop and clipboard classes}}
+
+\overview{Drag and drop and clipboard overview}{wxdndoverview}
+
+\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}}
+
+wxWindows has several small classes to work with disk files, see \helpref{file classes
+overview}{wxfileoverview} for more details.
+
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\helpref{wxFile}{wxfile}}{Low-level file input/output}
+\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}}
+
+wxWindows has its own set of stream classes, as an alternative to often buggy standard stream
+libraries, and to provide enhanced functionality.
+
+\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{wxFilterInputStream}{wxfilterinputstream}}{Filtered input stream class}
+\twocolitem{\helpref{wxFilterOutputStream}{wxfilteroutputstream}}{Filtered 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{wxZlibInputStream}{wxzlibinputstream}}{Zlib (compression) input stream class}
+\twocolitem{\helpref{wxZlibOutputStream}{wxzliboutputstream}}{Zlib (compression) output stream class}
+\twocolitem{\helpref{wxSocketInputStream}{wxsocketinputstream}}{Socket input stream class}
+\twocolitem{\helpref{wxSocketOutputStream}{wxsocketoutputstream}}{Socket output stream class}
+\end{twocollist}
+