\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{wxZipOutputStream}{wxzipoutputstream}}{Output stream for writing from ZIP archives}
\twocolitem{\helpref{wxSocketInputStream}{wxsocketinputstream}}{Socket input stream class}
\twocolitem{\helpref{wxSocketOutputStream}{wxsocketoutputstream}}{Socket output stream class}
\end{twocollist}
\twocolitem{\helpref{wxCmdLineParser}{wxcmdlineparser}}{Command line parser class}
\twocolitem{\helpref{wxConfig}{wxconfigbase}}{Classes for configuration reading/writing (using either INI files or registry)}
\twocolitem{\helpref{wxDllLoader}{wxdllloader}}{Class to work with shared libraries.}
-\twocolitem{\helpref{wxGLCanvas}{wxglcanvas}}{Canvas that you can render opengl calls to.}
-\twocolitem{\helpref{wxGLContext}{wxglcontext}}{Class to ease sharing of opengl data resources.}
+\twocolitem{\helpref{wxGLCanvas}{wxglcanvas}}{Canvas that you can render OpenGL calls to.}
+\twocolitem{\helpref{wxGLContext}{wxglcontext}}{Class to ease sharing of OpenGL data resources.}
\twocolitem{\helpref{wxLayoutAlgorithm}{wxlayoutalgorithm}}{An alternative window layout facility}
\twocolitem{\helpref{wxProcess}{wxprocess}}{Process class}
\twocolitem{\helpref{wxTimer}{wxtimer}}{Timer class}