‪Calculate Excel formulas by defining formulas with functions or loading template Excel files with predefined formulas in C#, VB.NET, Java, C++, PHP and other!
http://www.easyxls.com/manual/basics/excel-calculation-engine.html

‪Import Excel formula, export Excel with formula and calculate Excel formulas in C#, VB.NET, Java, C++, PHP and other!
http://www.easyxls.com/manual/basics/import-export-excel-formulas.html

‪Import data from Excel, export data to Excel in C#, VB.NET, Java, C++, PHP and other!
http://www.easyxls.com/manual/basics/import-export-excel-data.html

‪Create Excel files with multiple sheets in C#, VB.NET, Java, C++, PHP and other! EasyXLS™ library allows you to create Excel files with multiple sheets. There are two types of sheets: worksheets and chart sheets.
http://www.easyxls.com/manual/basics/create-excel-file-multiple-sheets.html

‪Create or read password protected Excel files in C#, VB.NET, Java, C++, PHP and other!

EasyXLS™ library enables you to protect your Excel file from unauthorized access by setting passwords for opening or / and modifying the document. If you set the password for opening the file, the Excel file will be encrypted.
http://www.easyxls.com/manual/basics/password-protected-excel-file.html

‪Create Excel filter or autofilter in C#.NET, VB.NET, Java, C++, PHP and other, using EasyXLS Excel library! It permits to filter a range of data from an Excel sheet and hide records that don’t meet your criteria, displaying just a subset of data in a range of cells.
http://www.easyxls.com/manual/basics/excel-filter-and-autofilter.html

‪Export data to XLSB file in C#.NET using EasyXLS Excel library! The file has multiple sheets and the first sheet is filled with data.
http://www.easyxls.com/manual/tutorials/csharp/export-data-to-xlsb-file.html

‪Export data to XLSX file in C#.NET using EasyXLS Excel library! The file has multiple sheets and the first sheet is filled with data.
http://www.easyxls.com/manual/tutorials/csharp/export-data-to-xlsx-file.html

‪Export data to Excel file in C#.NET with formatting styles using EasyXLS Excel library! http://www.easyxls.com/manual/tutorials/csharp/format-excel-cells.html

‪Export data to XLS file in C#.NET using EasyXLS Excel library! The file has multiple sheets and the first sheet is filled with data.
http://www.easyxls.com/manual/tutorials/csharp/export-data-to-xls-file.html