If you followed the best practices of the time, along the lines of the Charles Petzold "Programming Windows" book, there's a decent chance the program will still work. Problems is there was virtually no QC at the time, a lot of programs written by babies in Visual Basic, a lot of hacks, and a lot of weird drivers, and very few modern standards when it comes to internet protocols, file formats, and user permissions.
If you followed the best practices of the time, along the lines of the Charles Petzold "Programming Windows" book, there's a decent chance the program will still work. Problems is there was virtually no QC at the time, a lot of programs written by babies in Visual Basic, a lot of hacks, and a lot of weird drivers, and very few modern standards when it comes to internet protocols, file formats, and user permissions.