+\twocolwidtha{5cm}%
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\windowstyle{wxWS\_EX\_VALIDATE\_RECURSIVELY}}{TransferDataTo/FromWindow()
+and Validate() methods will recursively descend into all children of the
+window if it has this style flag set.}
+\twocolitem{\windowstyle{wxWS\_EX\_BLOCK\_EVENTS}}{Normally, the command
+events are propagared upwards to the window parent recursively until a handler
+for them is found. Using this style allows to prevent them from being
+propagated beyond this window. Notice that wxDialog has this style on by
+default for the reasons explained in the
+\helpref{event processing overview}{eventprocessing}.}
+\twocolitem{\windowstyle{wxWS\_EX\_TRANSIENT}}{This can be used to prevent a
+window from being used as an implicit parent for the dialogs which were
+created without a parent. It is useful for the windows which can disappear at
+any moment as creating childs of such windows results in fatal problems.}
+\twocolitem{\windowstyle{wxFRAME\_EX\_CONTEXTHELP}}{Under Windows, puts a query button on the
+caption. When pressed, Windows will go into a context-sensitive help mode and wxWindows will send
+a wxEVT\_HELP event if the user clicked on an application window.
+This style cannot be used together with wxMAXIMIZE\_BOX or wxMINIMIZE\_BOX, so
+you should use the style of
+{\tt wxDEFAULT\_FRAME\_STYLE & ~(wxMINIMIZE\_BOX | wxMAXIMIZE\_BOX)} for the
+frames having this style (the dialogs don't have minimize nor maximize box by
+default)}
+\end{twocollist}