Communication with running Windows service

How can I communica开发者_如何学编程te with running Windows service without stopping it using native C++? I need to pass integers and strings to service and get integers and to get back integers and strings.

Currently I do it through registry, but I would like use another, faster way.

Thank you in advance.

---

A few options:

• Communicate via ports
• Use RPC
• Use the file system