I’m afraid that to make it work, Microsoft would need to re-write their window transparency system. I don’t think it’s possible to add a normal window to a semi-transparent one in XP (maybe possible in Vista, but probably not)
Considering that I need the transparency for the main window only to have rounded corners, while the rest of the content is actually completely opaque, isn’t there a workaround? if I add a setOpaque component to the window, and I add to that the WebBrowserComponent, do you think it may work?