\begin{twocollist}\itemsep=0pt
\twocolitem{wxYES\_NO}{Puts Yes and No buttons on the message box. May be combined with
wxCANCEL.}
-\twocolitem{wxCANCEL}{Puts a Cancel button on the message box. May be combined with
+\twocolitem{wxCANCEL}{Puts a Cancel button on the message box. May only be combined with
wxYES\_NO or wxOK.}
\twocolitem{wxOK}{Puts an Ok button on the message box. May be combined with wxCANCEL.}
\twocolitem{wxICON\_EXCLAMATION}{Displays an exclamation mark symbol.}