Returns TRUE if a specified item in a selection
list is currently selected. Otherwise, the method returns FALSE.
      
        Return
type: LOGICAL
      
        Applies to:
        SELECTION-LIST widget
      
     
    Syntax
      
      
          
          
            
              
                IS-SELECTED ( list-item|list-index ) 
               | 
            
          
        
 
      
        
          - 
            list-item
          
 
          - A character-string expression that specifies a single value
in the selection list.
 
        
        
          - 
            list-index
          
 
          - An integer expression that specifies the ordinal position (first, second,
third, etc.) of an entry in the selection-list.