EMA C++ Developers Guide : 4 Consumer Classes : 4.1 OmmConsumer Class : 4.1.2 Opening Items Immediately After OmmConsumer Object Instantiation
 
4.1.2 Opening Items Immediately After OmmConsumer Object Instantiation
To allow applications to open items immediately after creating the OmmConsumer object, the Enterprise Message API performs the following steps when creating and initializing the OmmConsumer object:
Create an internal item watchlist.
Establish connectivity to a configured server / host.
Log into the server and obtain source directory information.
Obtain dictionaries (if configured to do so).