#include <db_cxx.h> int Db::get_type(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 either returns a non-zero error value or throws an
                exception that encapsulates a non-zero error value on
                failure, and returns 0 on success.
            
        
    
                         The Db::get_type() 
            
            
                method may fail and throw a DbException 
                exception, encapsulating one of the following non-zero errors, or 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.