0    S_OKAY
     normal return, everything worked okay.

1    S_EOS
     End of set. Returned when the end of the set has been reached by a set
     navigation function or function d_discon. Also returned by function
     d_isowner and d_ismember when current record is not currently an owner
     or member of the set.

2    S_NOTFOUND
     Record not found. Returned by key retrieval functions when the
     requested key is not found.

3    S_DUPLICATE
     Duplicate key. An attempt was made to store a duplicate value into a
     unique key field.

4    S_KEYSEQ
     Key sequence error. Function d_keyread was called before a key was
     located by a key locate function (e. g. d_keynext). This is more
     correctly a user error but is listed as astatus because this code has
     been redefined from a slightly different use in earlier versions.

5    S_UNAVAIL
     If returned from d_open, the database is not available. Either another
     uses has exclusive access or your exclusive access request cannot be
     satisfied because others are using the database. If returned from a lock
     request function, the request file(s) did not become available to you
     before you request timed out.

6    S_DELETED
     Returned by the record read functions (e. g. d_recread) and the timestamp
     status functions when record or set has been deleted since last accessed.

7    S_UPDATED
     Returned by timestamp status functions when the record or set has been
     updated since last accessed.

8    S_LOCKED
     Current record is locked.

9    S_UNLOCKED
     Current record is not locked.