normal under Windows and Motif, pressing return causes the default button to
be depressed when the return key is pressed. See also \helpref{wxWindow::SetFocus}{wxwindowsetfocus}\rtfsp
which sets the keyboard focus for windows and text panel items,\rtfsp
-and \helpref{wxPanel::SetDefaultItem}{wxpanelsetdefaultitem}.
+and \helpref{wxTopLevelWindow::SetDefaultItem}{wxtoplevelwindowsetdefaultitem}.
Note that under Motif, calling this function immediately after
creation of a button and before the creation of other buttons