\section{\class{wxNotebookEvent}}\label{wxnotebookevent}
-This class represents the events generated by a notebook control.
+This class represents the events generated by a notebook control: currently,
+there are two of them. The PAGE\_CHANGING event is sent before the current
+page is changed. It allows to the program to examine the current page (which
+can be retrieved with
+\helpref{GetOldSelection()}wxnotebookeventgetoldselection}) and to veto the page
+change by calling \helpref{Veto()}{wxnotifyeventveto} if, for example, the
+current values in the controls of the old page are invalid.
+
+The second event - PAGE\_CHANGED - is sent after the page has been changed and
+the program cannot veto it any more, it just informs it about the page change.
+
+To summarize, if the program is interested in validating the page values
+before allowing the user to change it, it should process the PAGE\_CHANGING
+event, otherwise PAGE\_CHANGED is probably enough. In any case, it is probably
+unnecessary to process both events at once.
\wxheading{Derived from}
+\helpref{wxNotifyEvent}{wxnotifyevent}\\
\helpref{wxCommandEvent}{wxcommandevent}\\
\helpref{wxEvent}{wxevent}\\
\helpref{wxEvtHandler}{wxevthandler}\\
\helpref{wxObject}{wxobject}
+\wxheading{Include files}
+
+<wx/notebook.h>
+
\wxheading{Event table macros}
To process a notebook event, use these event handler macros to direct input to member
\func{}{wxNotebookEvent}{\param{wxEventType}{ eventType = wxEVT\_NULL},
\param{int}{ id = 0}, \param{int}{ sel = -1}, \param{int}{ oldSel = -1}}
-Constructor.
+Constructor (used internally by wxWindows only).
\membersection{wxNotebookEvent::GetOldSelection}\label{wxnotebookeventgetoldselection}