|Date:||September 11, 2007 / year-entry #338|
|Summary:||Daniel Chait wonders why we have both EM_UNDO and WM_UNDO. You know, I wonder the same thing. But I'm going to make an educated guess. Actually, most of what I write is just a lot of educated guessing. Like my explanation of why GetWindowText has such complicated rules? A guess. Why address space granularity is...|
Daniel Chait wonders why we have both
Actually, most of what I write is just a lot of educated guessing. Like my explanation of why
Today's guesswork: The history of
It seems obvious that
At some point, somebody decided, "Hey, this sounds like something that people might want to do more generally." New messages
Therefore, the answer to the question is that for edit controls, the difference is that there is no difference.
The window manager does not provide a default implementation for any of these new messages. (Obviously, because the window manager is not psychic.) If you want your control to support those operations, you'll have to respond to the messages yourself.
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