EM_EXSETSEL bug in msftedit.dll, RichEdit50W

Question

EM_EXSETSEL bug in msftedit.dll, RichEdit50W

J J 1

The EM_EXSETSEL message doesn't work properly. In certain (rare) cases, when sending a chrg.cpMin...cpMax range, the cursor gets set to cpMax but no range is selected. Testbed hereindex.php

Note that...
C:\Windows\System32\RichEd20.dll
C:\Program Files (x86)\Common Files\Microsoft Shared\OFFICE11\RichEd20.DLL
C:\Program Files (x86)\Common Files\Microsoft Shared\OFFICE12\RichEd20.DLL

... and probably other have no such problems.

Answer 1

Jeanine Zhang-MSFT 5,981 Microsoft Vendor

Hello,

Welcome to Microsoft Q&A!

According to your description:
It turns out this bug has been fixed in Windows 10. However, software should be backwards compatible at least to Windows 7 IMHO (I don't really care for XP, although I loved it).

In my opinion, I still suggest you update the system to win10 or win11.

If you want to Microsoft fix the issue in win7, I'd suggest you could submit a feedback/feature request about this API/feature in the Feedback Hub. You could find the Feedback Hub in the Start Menu. Please select Developer Platform->API Feedback as the category when you submit your request. The related team will check the request.

Thank you.

Jeanine

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J J 1 Reputation point

2022-12-12T11:47:30.493+00:00

I'd suggest you could submit a feedback/feature request about this API/feature in the Feedback Hub. You could find the Feedback Hub in the Start Menu. Please select Developer Platform->API Feedback

Dear Janine,

I haven't been able to find this page, despite asking lots of questions to my friend Google. Are you sure the page exists? If yes, can you give me a URL, please?

Thanks a lot,
JJ
Jeanine Zhang-MSFT 5,981 Reputation points Microsoft Vendor

2022-12-13T01:22:02.49+00:00

@J J

Here is the steps:

1, Find the Feedback Hub in the Start Menu

2, Select Report a problem

3, When you submit your request, please select Developer Platform->API Feedback as the category.
J J 1 Reputation point

2022-12-13T02:08:44.887+00:00

Sorry, Janine, I don't see a "Feedback Hub", and I don't have an "App". What are the options for a "Windows" user equipped with a browser called "Microsoft Edge"?

Do you have a "URL" for me?

Thanks,
JJ
Jeanine Zhang-MSFT 5,981 Reputation points Microsoft Vendor

2022-12-13T02:24:31.487+00:00

@J J

Feedback Hub is an app. You could get it from the Microsoft Store. https://apps.microsoft.com/store/detail/feedback-hub/9NBLGGH4R32N?hl=en-us&gl=us
J J 1 Reputation point

2022-12-13T09:51:45.623+00:00

I am on a WINDOWS machine and have a WINDOWS problem, and you, Microsoft, suggest to download an Android app. Seriously?
Jeanine Zhang-MSFT 5,981 Reputation points Microsoft Vendor

2022-12-13T10:03:20.36+00:00

@J J

The Feedback Hub app is an app that comes with Windows. Usually, you could find the Feedback Hub in the Start Menu. If you couldn't find the Feedback Hub in the Start Menu. You could get the app in the Microsoft Store.
J J 1 Reputation point

2022-12-13T13:52:31.38+00:00

Feedback Hub is an app. You could get it from the Microsoft Store.
https://apps.microsoft.com/store/detail/feedback-hub/9NBLGGH4R32N?hl=en-us&gl=us

Fascinating, Janine, this "Feedback Hub". Have you read the three reviews at that page? Not mine ;-)
Btw clicking into "Get in Store app" or into the big image in the middle doesn't do anything. Broken links, I suppose.

Once upon a time, people hated Microsoft Windows because of its many bugs, its absolutely useless "Windows Help", and because of Microsoft's de facto monopoly. Nowadays I feel pity for Microsoft.
Jeanine Zhang-MSFT 5,981 Reputation points Microsoft Vendor

2022-12-14T06:27:25+00:00

@J J

Btw clicking into "Get in Store app" or into the big image in the middle doesn't do anything. Broken links, I suppose.

I tried to click "Get in Store app", and I can open the Microsoft store successfully.

Have you read the three reviews at that page?

Feedback Hub has bundled with Windows 10 and Windows 11.
And we're sorry that we didn't handle their feedback in a timely manner.
However, the Feedback Hub is the only official and free platform for collecting user feedback.

If you want to resolve this issue as soon as possible, I suggest you could also open an incident via 'Contact us' tab at the link: https://developer.microsoft.com/en-us/windows/support/. You will get 1:1 support on that. Please choose the 'Technical Support - Coding/Debugging' for Windows SDK for this issue. In-addition, if the support engineer determines that the issue is the result of a bug the service request will be a no-charge case and you won't be charged.

Answer 2

Update:

My editor is now running more or less fine on Win7 with Sys32\msftedit.dll, but on Win10...

with the Office12 dll, it hangs for one big (2.7 MB) document
with the original Win10 msftedit.dll it works, but it loads very, very slowly
with the Win7-64 msftedit.dll it works fine, a factor 5 (!) faster than the Win10 dll

So the new improved and possibly bug-free msftedit.dll is about 4 times more bloated than the Win7 version and loads documents a factor 5 slower. That's progress, congrats.

I will have to use the buggy Win7 version on Win10. It works, but occasionally, and only on big documents (>1MB), it inserts strange characters for no particular reason, and that insertion cannot be undone with Ctrl Z. Lovely ;-)

It's really a shame that Microsoft neglects the only control that is/should be able to use formatted text.

EM_EXSETSEL bug in msftedit.dll, RichEdit50W

2 answers

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