In the open source world we are used to software being compiled from source for our particular distro, so while in a few cases an ancient release may still be in use, it’s just going to run on the latest distro version. But in the Windows world it’s rare for software to come with the source, so you’re left with a binary that will only run if your Windows version has the right APIs for it. Since the more recent versions of Windows dropped 16-bit support a while back, that means there must be a hard date set on the earliest Windows GUI application that can still run today. [Enlyth] decided to investigate.
Given that the earliest API supported in WIndows 11 is the 32-bit version, the hunt led straight to either the first Windows NT release and ancestor of Windows 11, or the Win32s extension for WIndows 3.1. Thus a 1993 Win32S version of Freecell runs happily, but that want’s the end of the trail. Somewhere in the pre-release builds of Windows NT 3.1 would be the requisite binary, but there’s a snag. Early Windows NT 3.1 APIs were incompatible with later ones. This led through a lot of crashing binaries to a November 1992 version of the CD player app, that ran because it called a DLL which happens to still be present. The need for another DLL to emulate a CD drive speaks volumes about the progress of the PC world, back then they were the last word in storage but who’s got one now?
That’s the earliest official binary to run, but the story’s not quite over. Windows 11 may not have a VDM to run 16-bit apps, but
