Re: WM_MOUSEMOVE and OnMouseMove

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#3793

From: Remy Lebeau (TeamB)
Date: Mon, 24 Apr 2006 19:04

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"JD" <nospam@nospam.com> wrote in message
news:444c5cfe$1@newsgroups.borland.com...

> I was wondering how the VCL does it

I guess you didn't try looking at the VCL source code yet.

> it gets X,Y just like I'm getting them

No, it is not.  You are using the LO/HIWORD macros.  The VCL does not do
that.

> they're passed to the event as ints just like I was doing it.

The VCL is retrieving the values as signed shorts to begin with, but your
code is retreiving them as unsigned shorts instead.  A signed short passed
to a signed int parameter will preserve the sign.  Passing an unsigned short
to a signed int parameter will not preserve the sign for negative values.


Gambit

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Subject: Re: WM_MOUSEMOVE and OnMouseMove
Date: Mon, 24 Apr 2006 12:04:35 -0700
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