>>106220029
I just wrote a 20-line program in my head that would do that: it works by listening for NCCLICK messages, checks the status of modifier keys (though I'm not certain you'd be able to use the Windows key, Ctrl, Alt etc. would be fine) and taps on DefWindowProc to make the window think you've selected Move or Size from the window's System menu.
I have no idea if anyone's ever written something remotely like this, however.