Dominik S.
Posts: 2
Joined: Mon Sep 01, 2025 12:23 pm

File Associations: multiple extensions for same program

Hi,

i would like to register multiple extensions for my program.
In the https://www.advancedinstaller.com/user- ... tions.htmlthere is the following note:

Code: Select all

Only one extension should be associated with each ProgID.
Is this note still correct.
In the following sample https://www.advancedinstaller.com/user- ... ample.html and in the YoutTube video https://www.youtube.com/watch?v=AiRSgBHXk5k there are two extensions registered to the same ProgId

Regards
Dominik
Catalin
Posts: 7794
Joined: Wed Jun 13, 2018 7:49 am

Re: File Associations: multiple extensions for same program

Hello Dominik and welcome to our forums,

Please note that the first article is still up to date.

Although, as shown in the video&article, it is possible to have multiple extensions for the same ProgID, it is considerede a best practice not to.

How to Register a File Type for a New Application

We can see this stated in the above article as well:
If you plan to associate one or more file types with a new application, you must define a ProgID for each file type that you want to associate with the application.
Hope this helps!

Best regards,
Catalin
Catalin Gheorghe - Advanced Installer Team
Follow us: Twitter - Facebook - YouTube

Return to “Building Installers”