RadSpreadProcessing is part of the Telerik Document Processing libraries. The full documentation for this component is available at http://docs.telerik.com/devtools/document-processing/libraries/radspreadsprocessing.
RadSpreadProcessing is a document processing library that enables your applications to easily import and export files to and from the most common spreadsheet file formats.
Some of the features which you can use are:
Import/export to different spreadsheet formats.
More than 100 built-in formulas.
Powerful and easy-to-use API.