Entity: predicate

radio_button( )
radio_button(Arg1, ... , ArgN)

Creates a radio button control.

Put inside the brackets only these arguments which you need. All other arguments will be set by default. The arguments may be any of the following (the order is not important).
handle(Handle) handle to this radio button. 
parent(Parent) handle to the parent window.
class(Radio_func) predicate which will receive the messages from this radio button.
text(Text) the text which is on the radio button
pos(X,Y) coordinates of upper left corner
size(Width, Height)  size of the radio button
checked  flag (default off)
grayed  flag (default off)

Look at radio button methods:

R is get_check_box_value(Radio_Button)
set_check_box_value(Radio_Button, Value)

See also:

Look at the example:
Radio Buttons.spj (in folder Examples)