3.17) The groups of radio-buttons.

type gr_grprad =
  { ga_window : gr_window
  ; mutable ga_top : int
  ; mutable ga_left : int
  ; mutable ga_width : int
  ; mutable ga_height : int
  ; mutable ga_delta : int
  ; mutable ga_radio : int
  ; mutable ga_name : string vect
  ; mutable ga_callback : gr_grprad -> event -> bool
  }
;;
The groups of radio buttons are a rectangle filled with radio buttons. One of the radio buttons is selected, the others are unselected. The groups of radio buttons are similar to groups of buttons.
The groups of radio buttons, of type gr_grprad, are composed of: the functions linked with the type gr_grprad are:
gr_draw_grprad : gr_grprad -> unit
gr_draw_grprad Grprad draws the group of radio buttons Grprad.
gr_draw_unfilled_grprad : gr_grprad -> unit
gr_draw_unfilled_grprad Grprad draws only the outlines of the radio buttons of the group Grprad.
gr_grprad_managed : gr_grprad -> event -> bool
this is the function used by Camlwin to manage the group of radio buttons objects.