radio buttons

I have 2 radio button, once I check the 1st one, I can’t UNCHECK it.
I can check the 2nd, or the 1st, but I can uncheck both.
is it possible to uncheck both. Do I need another type of controller.

looks like a check box is what I need NOT the radio button

That is Radio Button by design. Grouped together, one of them is checked always.
Instead of, use check box, as Shawn B. suggested.

If u want a radio button to act as on/off then u must subclass it or make ur own.

u ne 2 rite flr wrds, not txt speech.