Imports Bytescout.Spreadsheet
Imports System.IO

Module Module1

    Sub Main()
        Dim document As New Spreadsheet()

        Dim worksheet As Worksheet = document.Workbook.Worksheets.Add("HelloWorld")

        worksheet.Cell(0, 0).Value = "Hello, World!"

        ' remove output file if already exists
        If File.Exists("Output.xls") Then
            File.Delete("Output.xls")
        End If

        ' Save document
        document.SaveAs("Output.xls")

        ' Close Spreadsheet
        document.Close()

        ' open in default spreadsheets viewer/editor
        Process.Start("Output.xls")

    End Sub

End Module