@lyse@lyse.isobeef.org Ah, thanks for letting me know about the typo. 😅

“PM” stands for “Presentation Manager” and is/was common prefix for graphical OS/2 programs. The PM actually got replaced by the “Workplace Shell” in version 2.0, but somehow the PM prefix kept being used. At least that is how I remember it. 🥴

Hmm, right, an “Abort” button. That could be useful. In my tests, the scans always finished so quickly that I didn’t even think about this … 😅

Looks like there’s not a lot of fancy magical stuff:

• https://komh.github.io/os2books/progfaq/112_L2_Whatisthebestwaytoco.html
  
• https://komh.github.io/os2books/progfaq/111_L2_Whatisthebestwaytoco.html
  

There is, however, a DosKillThread() function, which, as far as I know, does not exist on POSIX. 🤔 You can only send a signal to a POSIX thread and then it’ll hopefully end some day, right?

Killing threads is probably a bad idea, though. Who knows which state it’ll leave behind. It’s not like a process which will be properly cleaned up by the OS.

I think I’ll leave it as is. 🙂