I configured my app to open JPG files in Windows Explorer.
I'd like my app to have only a single instance in which every JPG files are loaded. I guess I have to make my app check whether there is an instance already running and if there is, communicate in some way the filenames to this already running instance so that it can load the files.
but how do I set this communication between the instances? What's the clever way to do it? Is there an event for this?