Radio control help

To create a radio control, call the API_Button_Create function using the BS_AUTORADIOBUTTON style.

Radio buttons are arranged in groups, and only one button in the group can be checked at any time. If the WS_GROUP flag is set for any radio button, that button is the first button in a group, and all buttons that follow it immediately in the tab order (but do not themselves have the WS_GROUP flag) are part of its group. If no radio buttons have the WS_GROUP flag, all the radio buttons in the dialog box are treated as a single group.

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