I know it was discussed before, but the Wiki supposedly has an official solution to "How can I get a window handle when all I have is a PID?". Alas, it doesn't seem to work for anything more complicated than Notepad.
It completely fails, for example, with IE & Firefox (even with "-new-window URL").
In addition, if you try to run multiple instances of the same program, than it fails with programs such as Chrome (i.e. it only works on the first instance).
I've tried the various alternative unofficial forum versions as well, to no avail.
The reason why it's so important is, for example, launching a browser with multiple resolutions.
Thanks!