You heard it from the horse’s mouth – IE doesn’t use standard Windows controls. So all those who continue to complain about how XUL “re-invents the wheel” by doing its own widgets, and how that has to be the cause of our allegedly poor performance (did you start Firefox recently?) can finally pipe down.
Raymond Chen is a Microsoft guy who writes a fascinating technical blog called The Old New Thing. While hoping I never have to use any of the technologies he discusses, he writes so well and comes out with such great historical nuggets that it’s essential reading.