>I followed the barcode thread recently and downloaded the free 3 of 9 font. Works great (once I remembered the asterisk LOL).
>
>If I decide to use this in a production app, do I have to install that font on every machine?

Yep. If you're using Installshield, just include the font in your installshield project, and set the destination to be the Windows font directory.

>Or can I simply include it in the app and have it work?

FWIW, I usually show the font in the Project (though "excluded") just for documentation.