I have a utility where I want it to appear at the front of the screen from time to time to request user input.
(I know this is very annoying to general behavior, but I have good reasons in this case.)
I found the RequestUserAttention method, which can be used for a more pleasant request for input from the user, but in my case I just want it to pop up.
Perhaps even modal on top of all other windows.
Here's the XP platform, if that matters.
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