> Can anyone tell me what is the raw format of the Firebird database files, so
> that I can directly write into a file without the overhead of the API's

You will have to analyse sourcecode for yourself to findout which
snippets of code to use.

Anyway I would not expect this to be an good approach. For Realtime
application you should consider an different design. One approach
would be to write the data into some temporary file which is moved to
import regulary. Of you can use an queue in memory with two threads to
make the realtime part inedependent of DB-Server reaction.

Elmar