https://bugs.winehq.org/show_bug.cgi?id=41062
--- Comment #17 from Esme Povirk madewokherd@gmail.com --- I thought of one other possibility: maybe WM_TAKE_FOCUS should be ignored (or should focus a different window) for tooltip windows. This needs more research to determine if there's some way that winex11.drv can determine that it shouldn't focus the window. If it is possible, it would mean we don't have to check the class name so it could theoretically work with a custom tooltip class or a subclass.