wx:get-single-choice-data

• (wx:get-single-choice-data message caption choices client-data parent x y center? width height) -> string or null
      message : string
      caption : string
      choices : list of strings
      client-data : list of strings
      parent = null : wx:window% object or null
      x = -1 : small integer
      y = -1 : small integer
      center? = #t : boolean
      width = 150 : small integer
      height = 200 : small integer

  Like wx:get-single-choice, but the return value is taken from the parallel list of string client-data instead of from choices.