Hiding and Showing
Widgets can be hidden and shown using :
DDgui_hide(id$ [, hide%])
id$ is the ID of the widget, and hide% shows or hides a widget. If hide% = TRUE then the widget is hidden. If hide% = FALSE then the widget is shown.
If a widget is hidden then all other widgets next to it will be re-positioned :
With both buttons shown
With Button 1 hidden