Class Libraries & REST APIs for the developers to manipulate & process Files from Word, Excel, PowerPoint, Visio, PDF, CAD & several other categories in Web, Desktop or Mobile apps. Develop & deploy on Windows, Linux, MacOS & Android platforms....formats, including XLS, XLSX, XLSM, XLSB, SpreadsheetML, TabDelimited...365 XLSX file FileFormatType_Xlsm Represents an Excel 2007/2010/2013/2016/2019...