How do I manage Forced Writes DB option in c++ code ? Interesting thread about Firebird

I post here code excerpt from my test MFC app, as someone else might find it useful, because the matter is poorly documented and I had to dig FB .NET data provider source code to manage. The code using FB client API can create a new FB DB with specified Forced Writes flag (BOOL m_bFW), or change the flag for existing database.

Here is the full thread