From a GUI perspective, I'd say this little tool, which I call WhoseWindow, is perfect now.
But there is one deep problem that remains, which I suspect is not possible to fix: In three cases the answer to "whose window" is so generic as to have limited usefulness, explorer, rundll and svchost.
Can someone think of a way to get more specific information in any or all of these cases? (Probably to be displayed in the info window as an additional line.)
Thanks -- Vincent