TBLT_RETC TBLT_ENTRY BltIx4PrevKey(TBLT_KH *khPtr,
VOID *keyBufferPtr,
ULONG *recNoPtr);
khPtr I:index file control structure
keyBufferPtr IO:the previous key
recNoPtr IO:recNo attached to the previous key
This routine gets the previous key and its recNo.
See also: BltIx4GetPrev().
This routine will use the contents of keyBufferPtr and recNoPtr as a
starting point if FLAGS_ATOMIC_BIT was used as the mode
when the index file was opened.
Return: Non-zero indicates an error, otherwise the previous key/recNo is returned.