RADIOBUTTONSET name state

Sets the state of the radio button that is identified by name to state. state must be either TRUE (pressed) or FALSE (unpressed).

Even though the user can only set one radio button in a group to TRUE at any given time, RADIOBUTTONSET can violate this constraint. If you use this command to set a radio button to TRUE, you should also set all the other radio buttons within the group box to FALSE.

TO CHECKONTHINGS
  IFELSE RADIOBUTTONGET "myhideturtle [HIDETURTLE] [SHOWTURTLE]
END

WINDOWCREATE "main "mywindow "mytitle 0 0 100 100 []
GROUPBOXCREATE "mywindow "mygroupbox 10 10 80 60
RADIOBUTTONCREATE "mywindow "mygroupbox "myhideturtle [Hide Turtle] 20 20 60 20
RADIOBUTTONCREATE "mywindow "mygroupbox "myshowturtle [Show Turtle] 20 40 60 20
RADIOBUTTONSET "myhideturtle "true
RADIOBUTTONSET "myshowturtle "false
BUTTONCREATE "mywindow "mybutton "Go 40 70 25 20 [CHECKONTHINGS]
WINDOWDELETE "mywindow