I want to build a windows app and I would like to be able to send and receive communication to and from the windows desktop app and mobile devices. For instance I would like to be able to scan the wifi network, see my app (from the mobile device and I would build in security measures) and then be able to change a slide for instance, or change text on the screen... so a remote control for a presentation for example.
Would it be best to build a web service in the windows app and have the mobile app scan for that service and send POST and GET commands? Is there a framework that would help with this already out there?
I am using Visual Studio 2017 and C# and looking to NOT use Powerpoint
There are many web frameworks for this reason. I would recommend Django if you are familiar with python or Golang if you are familiar with c++. (Golang is a language not a framework) If you write a server with HTTP POST and GET then you can access your server with a web browser in any device. If you want to have an specific app which communicates with your server you must write a client for your server. Since your server and client are separate, They can be in different languages for example I have written a server with Golang and a client with Qt.