+\twocolwidtha{5cm}%
+\begin{twocollist}\itemsep=0pt
+\twocolitem{\windowstyle{wxBU\_LEFT}}{Left-justifies the label. WIN32 only.}
+\twocolitem{\windowstyle{wxBU\_TOP}}{Aligns the label to the top of the button. WIN32 only.}
+\twocolitem{\windowstyle{wxBU\_RIGHT}}{Right-justifies the bitmap label. WIN32 only.}
+\twocolitem{\windowstyle{wxBU\_BOTTOM}}{Aligns the label to the bottom of the button. WIN32 only.}
+\twocolitem{\windowstyle{wxBU\_EXACTFIT}}{Creates the button as small as possible instead of making it of the standard size (which is the default behaviour ).}
+\end{twocollist}