[sqlite] How to determine db file version?

[Marco Bambini]

It is safe to read the first N bytes in a db file and check for the 
string "** This file contains an SQLite 2..." or the string "** This 
file contains an SQLite 3..." to determine if the db was created with 
the 2.x or 3.x version?

Is there a better method?
Thanks.
Marco Bambini
SQLabs.net