get-ps-setup-from-user in Dialogs

• (get-ps-setup-from-user message parent init-setup style) -> ps-setup% object or #f
   message = #f : string or #f
   parent = #f : frame% or dialog% object or #f
   init-setup = #f : ps-setup% object or #f
   style = null : an empty list of symbols

  Lets the user select a PostScript configuration though a (modal) dialog, using parent as the parent window if it is specified. The message string is displayed as a prompt in the dialog. If init-setup is provided, the dialog is initialized to the given configuration, otherwise the current configuration from current-ps-setup is used.

  The style argument is provided for future extensions. Currently, style must be the empty list.

  The result is #f if the user cancels the dialog, , a ps-setup% object that encapsulates the selected PostScript configuration otherwise.