You can find sample code for accessing the API on GitHub: github.com/whatismybrowser
We cover a number of popular software languages, giving examples to show how to connect to the API. If there's one that we haven't included that you want to see, just send us a message and we'd be happy to add it.
If you need to use Microsoft Excel to parse user agents, then please look at our spreadsheed to parse user agents. It will let you paste in user agents, send them to the API and then record the parse results.