Display a GUI window. The window need not have any contents, but should respond to requests to be closed.

win = window().new("New Window")
w = 320
h = 240
firstScreen = _system.deskTopRectList[1]
x = firstScreen.width/2 - w/2
y = firstScreen.height/2- h/2
win.rect = rect(x,y,x+w,y+h)
-- Director needs a binary movie file (*.dir) for opening new windows. But this
-- movie file can be totally empty, and if it's write protected in the filesystem,
-- it can be re-used for multiple windows.
win.filename = _movie.path & "empty.dir"
win.open()