I have a Visual Basic application, and there are a lot of clients using it. Every XX days I make some updates to the source, and after that, I contact every client to tell them that there is a new version of the application.
But I realize that I have a few clients using an old version of the system. Is there a way (by this I mean some kind of code, library, functions, etc.) to modify/update my master source, so that if a user is using an old version of the application, some kind of message appears after a successful log in into the system?
Message: "You are using v.1.00 and this is an old version of the system. Try to update to the newest version, v.2.01"
Additional to the information described above, in my VB application I used some parts of VB.net code for some actions that require connections to Internet web pages.
Any suggestions/help/comments or guidance would be very helpful!