Hi, I've run into a problem for which I can't find a solution.. I have an app (a toolbar) that is supposed to be always on top. I'm using win32api. I want the app window to be always on top, except when some other application goes fullscreen (e.g. ACDsee viewer). Does anybody know how to do this? My window is aleady always on top, but how do I tell when some other application goes fullscreen? thanks

Applications that use ChangeDisplaySettings to go fullscreen can be detected by your app if you process the WM_DISPLAYCHANGE method. I'm not sure if DX apps will send the same message, but it's worth looking into.