\section{\class{wxButton}}\label{wxbutton}
A button is a control that contains a text string,
-and is one of the commonest elements of a GUI. It may be placed on a
+and is one of the most common elements of a GUI. It may be placed on a
\rtfsp\helpref{dialog box}{wxdialog} or \helpref{panel}{wxpanel}, or indeed
almost any other window.