Radio buttons appear as hollow or filled circles with text beside the circles. They are usually put together into a group. If grouped, only one radio button in the group can be selected at a time; the selected radio button has its circle filled. When a user selects a radio button, that button is filled and others in the group are cleared.

You can write a response for an individual radio button. However, you will usually wait until the dialog box is finished with and then use the built-in function checked in group to find out which selection was the final one.