#include <db.h> int DB_SEQUENCE->get_key(DB_SEQUENCE *seq, DBT *key);
         The DB_SEQUENCE->get_key() method returns the key for the sequence.
    
           The DB_SEQUENCE->get_key() method may be called at any time during the life of the
           application.
        
                The DB_SEQUENCE->get_key() 
            
                  method returns a non-zero error value on failure and 0 on success.