In this quick and simple Excel how-to guide, let me show you the steps to turn on autosave in Excel. All you have to do is enable autosave in Excel and it will do the saving for you. Excel will give a warning though, how you handle the discrepancy is up to you. After all these years, Microsoft finally implemented the AutoSave feature in the newest version of Excel. xls extension and Excel will still open it, and so should you. xlsx extension and a new-style file with a. This will tell you the version of Excel that saved that particular file.Īlso note that Excel will determine whether to use new storage loading or old storage loading depending on the contents of the file and not only on the extension, as such you can store an old-style file with a. The above steps would enable Track Changes in Excel and now it will highlight any change done to. xlsx files, you can use any zip file library to open it, then open the docProps\app.xml file, and inside you'll find this: check the track changes option in the dialog box Click OK. That format is used up to Excel 2002 according to a table at the bottom of that article.Īs for. There's also some code in that article but I'm unsure how much I can lift from it without breaching copyright. In particular, it creates a data stream called "Workbook" (previously just "Book") where it saves the contents starting with a BOF (beginning of file) record. Microsoft Excel saves data using structured storage. xls files you need to decode the "BIFF" value, from MSDN: How To Determine the Version of a Microsoft Excel Workbook:
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