‪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

‪Set or read Excel sheet properties in C#, VB.NET, Java, C++, PHP and other! Properties like sheet name, sheet tab color, sheet zoom, hidden sheet, protected sheet or selected sheet are available.
http://www.easyxls.com/manual/basics/sheet-properties.html