@RasmusLindegaard well, it depends on what exactly you're trying to do. But you probably want to use either a mailto: link like you said, or if it's for some other app, use GLib.AppInfo like I do here: https://github.com/cassidyjames/ephemeral/blob/master/src/Widgets/BrowserButton.vala#L36
@cassidyjames RIght, thanks. I figured out something with LinkButton that seems to work just fine 😎
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