Office object model doesn't provide anything for generating a QR code, so you need to use a third-party application or tool as theDBguy suggested. If you want to generate it automatically, you need to add third party dlls as reference.
You may visit the following links to find some available dlls or tools.
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I like this suggestion because I think the OP asked for an approach applicable to computers without an Internet connection. Most solutions out there require access to something like the Google API, which means the computer using those methods will need
Internet access to get the resulting QR code. Using an Excel file as a source for generating a QR code doesn't sound like a bad alternative.
