RAD Studio VCL Reference
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TCustomRadioGroup Class

TCustomRadioGroup is the base class for radio-group components.

Pascal
TCustomRadioGroup = class(TCustomGroupBox);
C++
class TCustomRadioGroup : public TCustomGroupBox;

ExtCtrls

Radio groups are collections of radio buttons in a single group box. TCustomRadioGroup is the class from which radio-group components—including TRadioGroup and TDBRadioGroup—descend. 

Radio buttons that are contained directly in the same control component are said to be "grouped." When the user checks a radio button, all other radio buttons in its group become unchecked. Hence, two radio buttons on a form can be checked at the same time only if they are placed in separate containers, such as group boxes. 

 

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