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Re: [PATCH] Override Windows default Win-* key combinations when using E

From: Jussi Lahdenniemi
Subject: Re: [PATCH] Override Windows default Win-* key combinations when using Emacs
Date: Thu, 14 Jan 2016 14:49:31 +0200
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.1

On 13.1.2016 17.57, Eli Zaretskii wrote:
If you can see in GDB where does this come from and show the
backtrace, that would be great.  Failing that, let's leave Windows 9X
testing alone for a while (you can always test the fallback code by
forcefully failing one of the run-time tests for the newer versions)
and test only on W2K.  We can return to the 9X problem later.

I was able to get a GDB dump of this, after installing MinGW from 2009. The backtrace is attached.

I presume you built on a newer version of Windows and only ran on
Windows 9X?  I don't think the build procedure supports 9X.

Yes, exactly.

Getting back to the original issue: I verified that my code works on
Win2000. Unfortunately, I was not able to install NT4 on a VM, so I
cannot verify the code on that.

That's OK, W2K is good enough.  Thanks.

I *was* able to get NT4 installed finally as well, in a VM running inside a Win7 VM. However, even the official Emacs 24.5 release binary fails to work on NT4. It dies right at the start due to being unable to load its initialization files.

I investigated the problem and found out that it resulted from NT4's MultiByteToWideChar function not supporting the MB_ERR_INVALID_CHARS flags. I made the flag conditional on the OS version, after which Emacs runs just fine on NT4. I'm attaching a patch that contains this fix, and the conditional use of _resetstkoflw (which is also not supported on NT4) as well.

Also, I noticed that addpm.exe fails to load on a out-of-the-box NT4SP6, due to its dependency to a Shell32.dll version that ships with IE4. After installing IE4, addpm works. It's worth noting that directly installing IE6 on NT4 does NOT make addpm functional, as IE6 does not contain the shell update.

My keyboard hooking code works on NT4 as well (although not on console mode due to the lack of the GetConsoleWindow function - I'll try to find a workaround for this).

Jussi Lahdenniemi

Attachment: emacs-w98-crash.txt
Description: Text document

Attachment: 0001-Windows-98-and-NT4-compatibility-fixes.patch
Description: Text document

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