XlsRange Object
The Nasosoft.Documents.Xls.XlsRange object represents a cell, a row, a column, a selection of cells containing one or several blocks of cells. Before you can manipulate any region in the Excel documents, you need to get a XlsRange object and work with methods and properties of that object.
The Nasosoft.Documents.Xls.XlsRange object is the most popular object you will use within your spreadsheet applications.