values of {\it button} are:
\begin{twocollist}\itemsep=0pt
-\twocolitem{{\tt wxMOUSE\_BTN\_LEFT}{check if left button was pressed}}
-\twocolitem{{\tt wxMOUSE\_BTN\_MIDDLE}{check if left button was pressed}}
-\twocolitem{{\tt wxMOUSE\_BTN\_RIGHT}{check if left button was pressed}}
-\twocolitem{{\tt wxMOUSE\_BTN\_ANY}{check if any button was pressed}}
+\twocolitem{{\tt wxMOUSE\_BTN\_LEFT}}{check if left button was pressed}
+\twocolitem{{\tt wxMOUSE\_BTN\_MIDDLE}}{check if left button was pressed}
+\twocolitem{{\tt wxMOUSE\_BTN\_RIGHT}}{check if left button was pressed}
+\twocolitem{{\tt wxMOUSE\_BTN\_ANY}}{check if any button was pressed}
\end{twocollist}
\membersection{wxMouseEvent::ButtonDClick}