Websocket.cs is what you use in your resource. The rest are how to load StuykSocket.dll as a resource.

Meta.xml

<meta>
  <info name="StuykSocket" author="Stuyk" type="script" />
  <script src="StuykSocket.dll"/>
  <export class="StuykSocket" event="onSocketMessageRecieved" />
</meta>

settings.xml

Add this line:
<resource src="StuykSocket" />

Websocket.cs

public class Websocket : Script
{
    public Websocket()
    {
        NAPI.Exported.StuykSocket.onSocketMessageRecieved += new ExportedEvent(OnMessageSocket);
    }

    private void OnMessageSocket(dynamic[] parameters)
    {
        string result = parameters[0] as string;
        // This is the message you'll get from the program.
        // You can split it up by spaces to create parameters.
        // Switch statements to invoke functions and such.
        Console.WriteLine(result);
    }
}