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I’m looking to create a (most likely php) web server where a user can log in and send messages over the internet to a C# application that is running in the user’s taskbar on their home pc and display a message.
LogMeIn and Dropbox both seem to “push” data to the user’s pc without any needed information (no static ip address for the desktop side) so it must be possible but I’m not sure how.
Any help would be greatly appreciated, thanks!
The way I would do it is to have the C# desktop application act as a server and listen to socket connections. The PHP application could then connect on requests, send the required data then close the connection.
The only way to connect to another computer is to use some kind of address. These services probably have a central database of current user IPs. In your case, your C# application would know the “username” of the computer it’s on and every time it is started it could go update a field in a database with the current external IP. The PHP script could then fetch that to connect.