com.ibm.gre.IRMList.PrimaryKey Function
Returns the "Primary Key" value for the specified Item. The attribute that you wish to designate as the "Primary Key" is set in the constructor for this object.

Public string PrimaryKey (int)
  Type Name Description  
    int index The index of specifying the Item to return the "Primary Key" for.  
  Return Description  
    string The value of the "Primary Key"