TCP sockets in Pascal are generally hard to use; Free Pascal doesn't come with any high-level socket libraries by default, only a relatively low-level socket library. Some external libraries are available to make using sockets with Pascal easier, and one of these libraries is Synapse. Synapse is an easy-to-use socket library for Pascal, and in this blog post I'll try to show how to use Synapse to connect to a remote server and send/receive data from it.