-be called automatically when the window is resized. It is called implicitly by
-\helpref{wxWindow::SetSizer}{wxwindowsetsizer} but if you use
+be called automatically when the window is resized. Please note that this only
+happens for the windows usually used to contain children, namely
+\helpref{wxPanel}{wxpanel} and \helpref{wxTopLevelWindow}{wxtoplevelwindow}
+(and the classes deriving from them).
+
+This method is called implicitly by
+\helpref{wxWindow::SetSizer}{wxwindowsetsizer} but if you use