xlsgen is an Excel generation component. Support for programming languages such as VB, C/C++, C#, VB.NET, Java. xlsgen provides rich capabilities such as cell formatting, formulas, pictures, charts, ranges, calculation engine, hyperlinks, outline, comments, cell manipulations, ...
Excel documents can be either created from scratch or reopened.
In addition, xlsgen is provided with an automatic code generation tool, a general purpose end-user Excel diff tool, and a general purpose end-user keyword search tool in Excel files.

This tool is written in native code, is multithreaded (supports as many Excel document generation simultaneously), and is very very fast.