I am using Tooltips by applying the ScreenTipService.
These screen tips open up even when my application is covered by another window, like e.g. a web browser. (I move the other window over my application, move the mouse around and get screen tips from my application.) This doesn't happen always, but often.
It happens also (and absolutely always), when I have two grids in my application that share the same area, where one is visible and the other is collapsed. In this case the screen tips from the collapsed grid appear when the mouse hovers over an area which has no screen tip in the visible grid.
I am always setting ScreenTipHeader and ScreenTipDescription. Maintaining ScreenTipIsEnabled property helps, but is often not possible.
Is this a known issue, or is there maybe a way to avoid this behaviour?
I am using Windows 7. The behaviour is the same with classic and aero desktop themes.