Desktop Radio Button Group
From Xojo Documentation
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Radio Buttons are used to present the user with two or more choices, where only one of the choices can be selected. Selecting one Radio Button causes the Radio Button that is currently selected to become unselected. They are called Radio Buttons because they act just like the row of buttons for changing radio stations on car radios where pushing one button deselects the current radio station and selects the new station. Because a single radio button does not make sense, the DesktopRadioGroup control defaults to two Radio Buttons though you can add more.
Refer to DesktopRadioGroup in the Language Reference for details on all its events, properties and methods.
Below are the commonly used events and properties.
SelectionChanged - Called when a Radio Button in the group is selected.
SelectedIndex - The index of the selected Radio Button.
On Windows, a radio button whose Value is True can get the focus when you tab through the controls. Once a radio button has the focus, the arrow keys can be used to move to other radio buttons, changing the selection.
In the SelectionChanged event handler, you will put the code that should run when the button is selected.
You can also select a Radio Button in your code via the SelectedIndex property. Doing so will deselect the already selected Radio Button in the group.