> Thanks, a few minor comments below.

Thanks for the comments.  I hopefully applied all changes you
proposed.

Please keep in mind that I wrote the code almost two years ago and
then forgot about it.  It's only in the context of Bug#36269 that I
resurrected it - with all its inadequacies.

 >> @@ -3995,7 +3992,7 @@ kbd_buffer_get_event (KBOARD **kbp,
 >>         }
 >>       }
 >>     /* Try generating a mouse motion event.  */
 >> -  else if (!NILP (do_mouse_tracking) && some_mouse_moved ())
 >> +  else if (some_mouse_moved ())
 >
 > Can't we have mouse motion events outside track-mouse?

Not to my knowledge.  In either case, I wouldn't want to change
anything in this regard here.

 > There's too much of whitespace changes in the rest of the patch,
 > making it very hard to review.  Can you show the patch without
 > whitespace differences?

I attach a patch which re-adds some extraneous braces to w32term.c.
If you want me to restore more of the old code, please tell me.

Also, I do not intend to push the changes until someone tells me that
they work.  I neither use the mouse to drop nor mouse avoidance mode
and so have never given it any serious testing.

Thanks, martin