Enables the specified radio button within the
radio set.
      
        Return type: LOGICAL
      
        Applies to:
        RADIO-SET widget
      
     
    Syntax
      
      
      
        
          - 
            label
          
 
          - A character-string expression that specifies the label of a
radio button.
 
        
      
      If the operation is successful,
the method returns TRUE.