I have a hard time believing this considering the flag for it in Windows is called MB_ABORTRETRYIGNORE. How old of a Windows version are we talking? Are you sure you've seen this in actual Windows and not in an altered/joke screenshot?
He writes "16-bit Windows", and it's beyond anything I can find documentation for, but he's probably right. That's like pre-1992, I think. But it's been "Ignore" for so long that it's kind of silly to make jokes about it.
