Re: knowing if mouse is moving or not

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#2133

From: Paul Andre LeBlanc
Date: Tue, 13 Jul 1999 00:00

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Scott Seely wrote:

> I'm not sure that WM_NCHITTEST will work (it should only get fired for non-client mouse movemenets?).

No, it works in the client area as well - note that HTCLIENT is a
defined return value, indicating that the mouse is in the client area.
WM_NCHITTEST is sent immediately prior to the other mouse messages, and
its return value determines whether the next message will be - for
example - WM_MOUSEMOVE or WM_NCMOUSEMOVE.

The most significant thing about WM_NCHITTEST is the fact that it gets
passed from a child window up to its parent, allowing mouse motion
anywhere in any child to be detected by the parent (very useful for
implementing context-based help).

Paul

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From: Paul Andre LeBlanc <paul.a.leblanc@sympatico.ca>
Subject: Re: knowing if mouse is moving or not
Date: 1999/07/13
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