While using the DB Access Module for DB2 CLI, the database callbacks are invoked with respect to the allocation and deallocation of the RWDBDB2CLILibEnvironmentHandle and the SQLHENV it contains. The connection callbacks are invoked with respect to the allocation, deallocation, connect and disconnect of the RWDBDB2CLILibSystemHandle and the SQLHDBC it contains. Please refer to the DB Interface Module User's Guide for more information.

While using the XA Access Module for DB2 CLI, the callback locations remain the same.