app remotely control presentation from iPhone

I'm trying to build a simple app similar to the "Remote" app. Basically, it can connect via WiFi to a Mac and controls the presentation (MS Powerpoint 2008) on it, like going to the next or the previous slide. Also, there would be a "server" running on 开发者_如何学Pythonthe Mac that can talk to the iPhone app, which acts as client. Can anyone give me some pointers on how the client and server may be built? Thanks in advance.