callback or member function. {\bf wxEvent} used to be a multipurpose
event object, and is an abstract base class for other event classes (see below).
+For more information about events, see the \helpref{Event handling overview}{eventhandlingoverview}.
+
\perlnote{In wxPerl custome event classes should be derived from
\texttt{Wx::PlEvent} and \texttt{Wx::PlCommandEvent}.}