XPost: alt.comp.os.windows-11, alt.comp.os.windows-11

Can you please explain what is happening when I install HEIC?

Background.
1. I have been using Irfanview since forever.
2. Apple owner gives me HEIC image files to view & batch edit.
3. Irfanview 32 4.70 can't open them so I google & find this.
https://www.irfanview.com/faq.htm#PAGE6

That suggests a few methods, one of which is this. https://github.com/prsyahmi/wic_heic/releases/

That has this zip file containing "x86" & "64-bit" zips. https://github.com/prsyahmi/wic_heic/releases/download/v1.0.3/wic_heic-v1.0.3.zip

The x86 & x64 install batch files are named "_install.bat" containing this.
echo Please run as admin
@regsvr32 "%~dp0wic_heic.dll"
pause

The x86 & x64 uninstall batch files are named "_uninstall.bat" with this.
echo Please run as admin
@regsvr32 /u "%~dp0wic_heic.dll'
pause

There is a wic_heic.dll file in the x86 & the same name in the x64 folder.
x86 folder
Name: wic_heic.dll
Size: 3945472 bytes (3853 KiB)
SHA256: 702BA6AEADBD8D36473E4D9A9C129DDB19490EF7965B0B722794726E44C55A38

x64 folder
Name: wic_heic.dll
Size: 17239552 bytes (16 MiB)
SHA256: 2D1B1B9FA0653C8EEEDB6C86282D7EBA7D5B0A3632276189AD7029EAE83BE24D

The first question is if I'm only using 32-bit Irfanview, do I need to run
both the 32-bit & 64-bit install batch files and the second question is
what happens in Windows & Irfanview when I run these batch file?

Is the HEIC magic only for Irfanview after that?
Or do all image editors get to eat this heic magic muchroom dll?

What's going on under the covers to make this heic magic mushroom work?

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