#include <db.h> int DB_MPOOLFILE->close(DB_MPOOLFILE *mpf, u_int32_t flags);
         The DB_MPOOLFILE->close() method closes the source file indicated by
         the DB_MPOOLFILE structure.  Calling 
         DB_MPOOLFILE->close() does not imply a call to
         DB_MPOOLFILE->sync();
         that is, no pages are written to the source file as as a result of
         calling DB_MPOOLFILE->close.().
     
If the DB_MPOOLFILE was temporary, any underlying files created for this DB_MPOOLFILE will be removed.
         After DB_MPOOLFILE->close() has been called, regardless of its
         return, the DB_MPOOLFILE  handle may not
         be accessed again.
    
         The DB_MPOOLFILE->close() 
            
                  method returns a non-zero error value on failure and 0 on success.