[python-win32] python-win32 Digest, Vol 232, Issue 1

[monetclause at cs.com]

I've had my challenges with 3.10 and stayed on 3.9, with good results.

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Today's Topics:

  1. Unpredictable behavior of pywin32 on new computer (Zach York)
  2. Re: Unpredictable behavior of pywin32 on new computer
      (Tim Roberts)


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Message: 1
Date: Mon, 10 Oct 2022 12:34:43 -0700
From: Zach York <zyork.contribution at gmail.com>
To: python-win32 at python.org
Subject: [python-win32] Unpredictable behavior of pywin32 on new
    computer
Message-ID:
    <CAN+qs_PndgZtpdX-8vSx-euZPVTc4dXw=SytAKS+kmwNw-d6vw at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

Hello,

I have recently upgraded my computer and after upgrading and installing
pywin32, I have found the behavior to be extremely unpredictable and in a
lot of cases, just wrong.

Environment:
Python 3.10 (upgraded from python 3.9 on the previous computer)
pywin32 304
Windows 10: 19044.2006

My scripts are mostly trying to do some background clicking using
PostMessage/SendMessage  and window resizing/positioning using MoveWindow.
I used to be able to use SendMessage reliably before this computer upgrade,
but now it seems like I need a combination of PostMessage + SendMessage to
see a click at all). For MoveWindow, the results are entirely unpredictable
(window isn't moved at all, window resized and moved to the wrong location,
etc).

I assume this has to somehow be with my setup and not pywin32, but I am
lost on what might be causing this weird behavior. Any insight would be
greatly appreciated!

Thanks,
Zach
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Message: 2
Date: Mon, 10 Oct 2022 16:41:50 -0700
From: Tim Roberts <timr at probo.com>
To: python-win32 at python.org
Subject: Re: [python-win32] Unpredictable behavior of pywin32 on new
    computer
Message-ID: <a548a50a-f7a2-5042-f046-b5904d328643 at probo.com>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

Zach York wrote:
>
> I have recently upgraded my computer and after upgrading and 
> installing pywin32, I have found the behavior to be extremely 
> unpredictable and in a lot of cases, just wrong.
> ...
> My scripts are mostly trying to do some background clicking using 
> PostMessage/SendMessage ?and window resizing/positioning using 
> MoveWindow. I used to be able to use SendMessage reliably before this 
> computer upgrade, but now it seems like I need a combination of 
> PostMessage?+ SendMessage to see a click at all). For MoveWindow, the 
> results are entirely unpredictable (window isn't moved at all, window 
> resized and moved to the wrong location, etc).
>
> I assume this has to somehow be with my setup and not pywin32, but I 
> am lost on what might be causing this weird behavior. Any insight 
> would be greatly appreciated!

If you upgraded your display as well, the problem is probably the 
display scaling.? Unless you mark your application has being "high DPI 
aware", Windows will lie to you about pixel locations.? If your display 
is 3840x2160, but you have scaling set to 200%, your "non-aware" 
application will be told that the display is 1920x1080, and the pixel 
coordinates you are sending to other applications will be wrong.? Go 
read about "high DPI aware" applications.? It's a mess.

-- 
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.

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