ET_NUM_SELECTIONS, MSG_GEN_ITEM_GROUP_GET_MULTIPLE_SELECTIONS</PRE>
<P>
Within a GenItemGroup, each GenItem must contain an identifier, often an enumerated value, to uniquely identify that item. The GenItemGroup will use this identifying value whenever referencing the GenItem (or items), either through its instance data or through messages. This value is stored in the GenItem's GII_<CODE>
identifier</CODE>
 instance data. </P>
<P>
In most cases, your collection of GenItems within a particular GenItemGroup s