I'll see if I can get the 'screenshare.library' docs from Willy. I'm still
not very happy with screenshare, because it is set up as a "master/slave"
thing, where one application still "owns" the screen, and others are
visitors; I think that once the screen is registered as "shared" there should
be no "master", it should just be last one out closes the screen. But for
now it beats anything else around…