#include <db_cxx.h> int DbChannel::close(u_int32_t flags);
        The DbChannel::close() method 
        closes the DbChannel handle, freeing any resources
        allocated to the handle. All DbChannel handles must be
        closed before the encompassing environment handle is closed.
        Also, all on-going messaging operations on the channel should be
        allowed to complete before attempting to close the channel handle.
    
         After DbChannel::close() has been
         called, regardless of its return, the DbChannel handle may
         not be accessed again.
    
         The DbChannel::close() 
            
            
                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 DbChannel::close()
            
            
            
                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: