Hi, i also use WPF, you are not the only one. The problem in WPF is surely the "airspace". In WPF you can't have in the same window overlapping technologies. And if the window is a popup window, if it has transparency activated, you will also experiment the same problem (but this time it depends on the graphics card). This is a issue in Windows XP, not in Windows Vista. This is due to the windowing management.
Windows XP has also a problem with transparent windows (overlay) for a long time ago, since it was not thought to render transparent windows (where the color of a pixel depends on more than one window). I think tooltips are window (like menu, context menu and so on), and the tooltip has transparency activated. W.r.t. whether you are fool to use WPF or Qt or wxWidgets or whatever windowing technology you use: They are tools, you as programmer are the artisan. I would choose the best to the project in hands. All have problems and limitations and different design philosophies, and... the list is long enough to be discussed ad limitum. Really, evangelism is the problem. Open Mind the solution. (My apologies to everyone, i'm not good writing english, and i don't want to offend anyone, this is just a personal point of view). Just kidding a bit... Thank you all the OSG community, i think all of you are open minders. Himar.
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