An easy to understand guide on how to calculate xirr function with spreadsheet sdk in VB.NET with this source code sample. ByteScout Data Extraction Suite is the set that includes 3 SDK products for data extraction from PDF, scans, images and from spreadsheets: PDF Extractor SDK, Data Extraction SDK, Barcode Reader SDK. It can be applied to calculate xirr function with spreadsheet sdk using VB.NET.
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Imports System.IO Imports Bytescout.Spreadsheet Module Module1 Sub Main() ' Create new Spreadsheet Dim document As New Spreadsheet() ' Set locale document.Workbook.Locale = New System.Globalization.CultureInfo("en-US") ' Add new worksheet Dim worksheet As Worksheet = document.Workbook.Worksheets.Add() ' Fill some data worksheet.Cell(1, 1).Value = New DateTime(2008, 1, 1) worksheet.Cell(1, 2).Value = 100 worksheet.Cell(2, 1).Value = New DateTime(2009, 1, 1) worksheet.Cell(2, 2).Value = -200 ' Apply function worksheet.Cell(4, 1).Formula = "=XIRR(C2:C3,B2:B3,0)" ' Read value worksheet.Cell(4, 2).Value = worksheet.Cell(4, 1).Value ' delete output file if exists already If File.Exists("Output.xls") Then File.Delete("Output.xls") End If ' Save document document.SaveAs("Output.xls") ' Close Spreadsheet document.Close() ' open generated XLS document in default program Process.Start("Output.xls") End Sub End Module