ZMQ C++ Topics for Publish/Subscribe

For my Publisher/Subscriber pattern I want to use topics. So publish different messages on different topics. I already used topics in ZMQ with Python, but can not find how to use in C++.Is it possible to use topics with zmqcpp, or do I have to use different ports?

My publisher is very simple, similar to this one: http://zguide.zeromq.org/cpp:durapub

Thanks