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          | Description | IdnListAppend appends an Idn 
              (idn) to an IdnList (idnList).  |  | 
   
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          |  | idnList | a handle to the IdnList object. |   
          |  | idn | a handle to an Idn object. |   
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          | Return Values |   
          | MPIMessageOK | if IdnListAppend 
            successfully appends the Idn to the IdnList |   
          | MPIMessageHANDLE_INVALID | Either idnList 
            or idn is an invalid handle. |   
          | MPIMessageNO_MEMORY | Not enough memory was available. |  | 
   
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