No, the two processes are independent and do not share common memory - you really, really wouldn't want that in practice as it leads to all sorts of problems with apps interfereing with each other by accident!
Instead, use the
Socket Class (System.Net.Sockets) | Microsoft Docs[
^] to communicate directly between the two processes and pass information that way.
Google will find you loads of examples of client / server Socket coms and VB and C# will interact very easily.