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Ctrl+C from Time&Sales does not use LVM_GETITEMTEXT at all.
This list is owner data and has its own direct buffer that is 2 orders of magnitude faster than windows messages.
That is internal AB structure not exposed by any API.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: "Julian" <juliangoodsell@xxxxxxxxxxxx>
To: <amibroker@xxxxxxxxxxxxxxx>
Sent: Friday, July 17, 2009 4:54 PM
Subject: [amibroker] ADK SendMessage
> I'm working on my first AFL plugin using Dev-C++. I'm a programmer by trade, but not a Windows programmer.
>
> Anyway, after three days of brutal toil, I've managed to access the Time & Sales window. However to read the contents, I'm using
> the SendMessage LVM_GETITEMTEXT function which is really slow. I don't fully understand the windows messaging system yet, so don't
> get where the performance issue is. Something to do with them being queued?
>
> 40,000 SendMessage requests takes around 1.6 seconds which is way slow and that's only for 1 column of data. I can read and
> process 4 columns of the same data from a text file in around 50ms.
>
> For realtime, where you'd only be reading maybe 500 records at a time, there's 4000 SendMessage calls and even that takes 100ms.
> As I don't understand Windows very well, is there a faster way of doing this? Can I get a reference to the actual class itself?
>
> When I copy (CTRL+C) from the Time & Sales window, it's so quick it's barely noticeable on the cpu graph. It'd be quicker for me
> to send a CTRL+C key message to the window and then process the data from the clipboard, which is a viable option if there's
> nothing else.
>
> Hopefully there's some Windows programmers around here.
>
> Thanks,
> Julian.
>
>
>
> ------------------------------------
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------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
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SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
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