How to get radio buttons on a dialog

static void Job1(Args _args)
{
    Dialog                dialog;
    FormRadioControl      formRadioControl;
    FormBuildRadioControl formBuildRadioControl;
    FormBuildGroupControl formBuildGroupControl;
    int                   formBuildRadioControlId;
    ;
    //Build dialog with radio buttons
    dialog = new Dialog("Test Dialog");
    formBuildGroupControl = dialog.mainFormGroup();
    formBuildRadioControl = formBuildGroupControl.addControl(FormControlType::RadioButton,'radiobuttons');
    formBuildRadioControlId = formBuildRadioControl.id();
    //set number of buttons
    formBuildRadioControl.items(3);
    //add descriptions
    formBuildRadioControl.item(1);
    formBuildRadioControl.text("Radiobutton 1");
    formBuildRadioControl.item(2);
    formBuildRadioControl.text("Radiobutton 2");
    formBuildRadioControl.item(3);
    formBuildRadioControl.text("Radiobutton 3");
    
    if(dialog.run())
    {
        if(formBuildRadioControl)
        {
            //get control
            formRadioControl = dialog.formRun().control(formBuildRadioControlId);
            //get index
            info(strfmt("Radiobutton %1 selected",formRadioControl.selection()+1));
        }
    }
}