#include <db_cxx.h> int Db::get_blob_threshold(u_int32_t *bytes);
         The Db::get_blob_threshold() method
         returns the threshold value, in bytes, beyond which data items are
         stored as BLOBs. This value can be set using
         Db::set_blob_threshold(). A value of 0 indicates
         that BLOBs are not in use for this database.
    
         The Db::get_blob_threshold() method
         always returns 0 to indicate success.