Dim wb As PoiWorkbook
dim Sheet_SIPARIS As PoiSheet
wb.InitializeExisting("Foldername","file name","")
If wb.IsInitialized Then
Sheet_SIPARIS=wb.GetSheet(0)
Dim row As PoiRow
row=Sheet_SIPARIS.getRow(1) ' this line read line on selected sheet
Dim poicells As PoiCell
poicells= row.CreateCellString(0, DateTime.Date(datetime.now)) 'this line change volues on cell(1,0)
end if
wb.save("Foldername","file name")
wb.Close