\wxheading{Event handling} To process input from a notebook control, use the following event handler macros to direct input to member functions that take a \helpref{wxNotebookEvent}{wxnotebookevent} argument. \twocolwidtha{7cm} \begin{twocollist}\itemsep=0pt \twocolitem{{\bf EVT\_NOTEBOOK\_PAGE\_CHANGED(id, func)}}{The page selection was changed. Processes a wxEVT\_COMMAND\_NOTEBOOK\_PAGE\_CHANGED event.} \twocolitem{{\bf EVT\_NOTEBOOK\_PAGE\_CHANGING(id, func)}}{The page selection is about to be changed. Processes a wxEVT\_COMMAND\_NOTEBOOK\_PAGE\_CHANGING event. This event can be \helpref{vetoed}{wxnotifyeventveto}.} \end{twocollist}