I have been interested for a long time how to do so that the one instance was running only. I mean I have known in theory with the help of what it should be done, but I haven’t tried yet..Another very interesting thing is how to do as for instance I open an Excel spreadsheet and it does not open in another application, but the fact that is already open. This course enrages sometimes, but still technology is interesting.
The rustling in the Internet has brought to what is called Interprocess Communication (IPC) and there are many ways how to implement it, depending on the ultimate goal, whether you have only one instance, or as in Excel, or something else. Further study of the issue and gave birth to this article.