I have a JavaScript Excel Add-in deployed in production, being used by a number of customers. The Add-in includes a custom function. I have added new optional parameters to the function but when I ...

The ability to automate tasks in Excel for the web has been a long wait—but it’s finally here, and it was worth the wait. One thing users have clamored for is web apps that support code (macros or ...

Add Yahoo as a preferred source to see more of our stories on Google. At its Ignite conference, Microsoft today announced an update to Excel that brings a new JavaScript API to the venerable ...

At its Ignite conference, Microsoft today announced an update to Excel that brings a new JavaScript API to the venerable spreadsheet app. With this new API, developers will be able to create custom ...

Custom functions enable you to add new functions to Excel by defining those functions in JavaScript as part of an add-in. Users within Excel can access custom functions just as they would any native ...

Well, that didn’t take long. A few minutes after writing about the potential risks that might be introduced by Microsoft announcing JavaScript support in Excel custom functions, I wondered out loud ...

Shortly after Microsoft announced support for custom JavaScript functions in Excel, someone demonstrated what could possibly go wrong if this feature is abused for malicious purposes. As promised last ...