message+check-box in Dialogs

See also message+check-box/custom.

• (message+check-box title message check-label parent style) -> symbol in '(ok cancel yes no)
   title : string (up to 200 characters)
     message : string
     check-label : string (up to 200 characters)
     parent = #f : frame% or dialog% object or #f
   style = '(ok) : list of symbols in '(ok ok-cancel yes-no caution stop checked)

  Like message-box, except that

  • the dialog contains a check box whose label is check-label;

  • the result is two values: the message-box result, and a boolean indicating whether the box was checked; and

  • style can contain 'checked to indicate that the check box should be initially checked.