Now I am particularly confused. How do I issue "CREATE DATABASE ..." from my program? I thought that I needed a connection (PGconn) before I could execute a command and I don't believe I have a valid connection if my attempt to connect to a (non-existent) DB fails. [Does it change anything that I'm writing in C++ and using the 'libpq' interface?]
Let's assume for the moment; that you know how to connect to an existing database and execute an SQL command like "SELECT ....".
Simply modify your code: * change your connect command so it connects to "template1" * change your "SELECT ..." statement to "CREATE DATABASE ..." * close the connection and make a connection to database just created.