API Manual

TActiveRadioButtonList is the active counterpart to the original TRadioButtonList control.

The AutoPostBack property is set to true by default. Thus, when a radio button is clicked a OnCallback event is raised after OnSelectedIndexChanged event.

With ActiveControl.EnableUpdate set to true (default is true), changes to the selection will be updated on the client side.

List items can not be changed dynamically during a callback request.

Please refer to the original documentation of TRadioButtonList for usage.