Associating an icon to a file

if your app has an icon which shows on the desktop (Mac) and this app creates a file once it’s run, how do you manage to show the same (or similar) icon in the generated file, instead of the generic icon?

Thank you

Have a look at .

Sorry I’m late. But I made it.

Thank you

[code]File Type Set Editor
From Xojo Documentation

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Surprise !