Re: WM_APP wparam

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#8883

From: Alan Bellingham
Date: Fri, 27 Aug 2004 06:56

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"Digby Millikan" <digbym@internode.on.net> wrote:

> I use WM_APP for my messages should I also use WM_APP for wparams,
>or are ther alternatives i.e.
>
>        #define WM_TITLE WM_APP+1
>        #define TI_TITLE1 WM_APP+2
>
>        SendMessage(GBNGHandle,WM_TITLE,TI_TITLE1,NULL);
>
> Is this appropriate to use WM_APP for wparam also?

No, it is not. It is merely confusing.

Once you're sending messages in your own range, it is entirely up to you
what wParam and lParam are meant to mean. The convention is that if
they're not being used, you set them to zero.

Alan Bellingham
-- 
Me <url:mailto:alanb@episys.com> <url:http://www.doughnut.demon.co.uk/>
ACCU - C, C++ and Java programming               <url:http://accu.org/>
The 2004 Discworld Convention                   <url:http://dwcon.org/>

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Subject: Re: WM_APP wparam
Date: Fri, 27 Aug 2004 07:56:20 +0100
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