public static void Run()
{
// ExStart:1
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
// Instantiating a Workbook object
Workbook workbook = new Workbook(dataDir + "Book1.xls");
Worksheet worksheet = workbook.Worksheets[0];
// Setting an R1C1 formula on the "A11" cell,
// Row and Column indeces are relative to destination index
worksheet.Cells["A11"].R1C1Formula = "=SUM(R[-10]C[0]:R[-7]C[0])";
// Saving the Excel file
workbook.Save(dataDir + "output.xls");
// ExEnd:1
}
}