#include <db.h> int DB->get_type(DB *db, DBTYPE *type);
         The DB->get_type() method returns the type of the underlying access
         method (and file format).  The type value is one of DB_BTREE, DB_HASH,
         DB_RECNO, or DB_QUEUE.  This value may be used to determine the type
         of the database after a return from DB->open()  
         with the type parameter set to DB_UNKNOWN.
    
             The DB->get_type() method may not be called before the 
             DB->open()  method is called.
    
         The DB->get_type() 
            
                  method returns a non-zero error value on failure and 0 on success.
            
            
        
    
                         The DB->get_type() 
            
                 method may fail and return one of the following non-zero errors:
            
            
        
                    
If the method was called before DB->open() was called; or if an invalid flag value or parameter was specified.