radio_button
Entity: predicate

Usage:
radio_button(Handle, Parent, Radio_func, Text, X, Y, Width, Height)

Creates a radio button control.

Handle | handle. Use _ if you don't need it.
Parent | handle of the parent window. Use _ for default.
Radio_func | predicate which will receive edit messages
Text | the text on the control
X,Y | coordinates of upper left corner
Width, Height | size of the window

Look at radio button methods:

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

See also:
window

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