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Editorial Team
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Asked: 2026-05-28T13:14:49+00:00

In the Inno Setup FAQ is an example of how to assign filetypes to

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In the Inno Setup FAQ is an example of how to assign filetypes to my software. Dealing with the registry is no problem.

But how can I provide the user the choice of which filetypes he wants to assign? Let’s say, I have written a simple editor for text files and want to ask if the user wants to assign .txt and/or .nfo with my program. A setup-page with checkboxes would be genius.

How to do this with Inno Setup?

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1 Answer

  1. Editorial Team

    Add a ‘Task’ to the setup, and associate each of the registry entries of your file association with this Task. Eg:

    [Tasks]
Name: mypAssociation; Description: "Associate ""myp"" extension"; GroupDescription: File extensions:

[Registry]
Root: HKCR; Subkey: ".myp"; ValueType: string; ValueName: ""; ValueData: "MyProgramFile"; Flags: uninsdeletevalue; Tasks: mypAssociation 
Root: HKCR; Subkey: "MyProgramFile"; ValueType: string; ValueName: ""; ValueData: "My Program File"; Flags: uninsdeletekey; Tasks: mypAssociation
...

    See the documentation of ‘Tasks’ here.

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