How can Microsoft XML Parser 4.0 be installed from Inno Setup? - inno-setup

Question

I need to install Microsoft XML Parser 4.0 from Inno Setup.
How can that be done?
I was given a task to embed MSXML in the installer of ours. It's a proprietary piece of software our company makes (for accounting, it uses XML to store and exchange data). Apart from modern systems It's also going to be installed on many old systems using Windows XP.
I'm using Inno Setup 6.1.2.
Also, is there a quiet mode of installation as an option? So the users won't have to click anything and just be notified that MSXML was installed?

Answer 1

Did you Google this?
https://silent-install.net/software/microsoft/msxml_parser/4.30.2107.0
Eg:
msxml.msi /qn /L* "%temp%\XML Parser 4.30.2107.0.log" /norestart ALLUSERS=2
If you look at the Msiexec (command-line options) it does say the qn switch will display no user interface.

Answer 2

Somewhat of an aside, the requirement of installing both on XP and on 'modern' systems may create a conflict that you or your installer will have to resolve.
From Installing and Redistributing MSXML 4.0:
System Requirements
MSXML 4.0 is supported in Windows Server 2008 R2, Windows 7, Windows
Server 2008, Windows Vista Windows Server 2003, Windows XP, and
Windows 2000
From Installing and Redistributing MSXML 6.0:
System Requirements
MSXML 6.0 is supported in Windows Vista; Windows 2000 Service Pack 4;
Windows Server 2003; Windows Server 2003 Service Pack 1; Windows XP
Service Pack 1; Windows XP Service Pack 2.
MSXML 6.0 is preinstalled with Windows Vista. For earlier versions of
Windows, you can install MSXML 6.0 as a separate download.
So you can only use MSXML4 below Vista. And with Vista and above you should be able to reply on MSXML6 already existing.
Your installer could perform an OS version check (alt ref) and then only install MSXML4 if needed. Or you might be able to detect specifically if MSXML6 is installed and then install MSXML4 only if not (assuming therefore its an older system).
But I would test your application (if you haven't already) and see if it will run against MSXML6; it may, without changes. If so then I would forget MSXML4 and include MSXML6 in the installer instead (*). That way your installer could just run it 100% of the time, and expect that on Vista and up it would just do nothing. Your installer would therefore be simpler plus you would be taking advantage of "MSXML 6.0 provides security and performance improvements over earlier MSXML versions." noted here.
(*) Unless you have to run on WinXP pre-SP1?