Page History

...

A radio button represents an exclusive choice within a set of related options. Within a set of radio buttons, only one button can be ON at any given time. The following figure shows active radio buttons and inactive radio buttons in both ON and OFF states.

Figure 1 Radio Buttons
Image RemovedImage Added

When users click a radio button, its setting is always set to ON. An inner filled circle within the round button graphic indicates that the setting is selected. If another button in the set has previously been selected, its state changes to OFF. When a radio button is unavailable, users cannot change its setting.

...

Figure 2 Radio Button Menu Items 
Image RemovedImage Added

Note that there is no difference in behavior of radio buttons on Desktop and Embedded, except that there is no mnemonic support on Embedded platforms.

...