RAD Studio VCL Reference
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TRadioButton.Checked Property

Determines whether the option represented by the radio button is selected.

Pascal
property Checked: Boolean;
C++
__property Boolean Checked;

Read Checked to determine whether the radio button is selected. Set Checked to true to select the radio button and deselect all other radio buttons in the same container. Set Checked to false to deselect the radio button, leaving no radio button in the group selected. 

 

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