How do I add an Excel spreadsheet to a workflow?

How can I attach a Microsoft Excel file and send it to a customer in my workflow?

You should use the SOFM (SAP Office File Manager) object type. This object will allow you to attach any PC-based file, including Excel. Method SOFM.ImportFile will take your PC-based file and convert it into an instance of SOFM. Once you have that, simply bind that into the work item container. The user will then see this as an attachment to the work item and the user will be able to open the file.