\twocolwidtha{5cm}
\begin{twocollist}\itemsep=0pt
\twocolitem{\windowstyle{wxTR\_HAS\_BUTTONS}}{Use this style to show + and - buttons to the
-left of parent items.}
+left of parent items. Win32 only. }
\twocolitem{\windowstyle{wxTR\_EDIT\_LABELS}}{Use this style if you wish the user to be
able to edit labels in the tree control.}
\twocolitem{\windowstyle{wxTR\_MULTIPLE}}{Use this style to allow the user to