WindowFun creates an overlay wndow for each window. To use less
memory, I would like to have one overlay window for all the windows.
Would grouping the overlay window with the front window and keeping
track of it myself by calling ReleaseWindowGroup() as a window
deactivates and calling SetWindowGroup() as it activates work?
It should work. You don't need to use ReleaseWindowGroup, just
SetWindowGroup to move the overlay window into the group of the active
window; leave the group of the window that's deactivating alone and
you'll simplify your code. This assumes, of course, that you only need
the visual effect of the overlay window on the active window.
-eric
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