class RunnableClass2
{
    public static void main(Args _args)
    {
        CustTable custTable;
        DocuFileSaveResult saveResult =
    DocuFileSave::promptForSaveLocation("@ApplicationPlatform:OfficeDefaultWorkbookFileName","xlsx", null, "excel create and export");
        if (saveResult&& saveResult.parmAction() != DocuFileSaveAction::Cancel)
        {
            saveResult.parmOpenParameters('web=1');
            saveResult.parmOpenInNewWindow(false);
            System.IO.Stream
      workbookStream = new System.IO.MemoryStream();
            System.IO.MemoryStream
      memoryStream = new System.IO.MemoryStream();
            using(var package = new OfficeOpenXml.ExcelPackage(memoryStream))
            {
                var worksheets = package.get_Workbook().get_Worksheets();
                var worksheet = worksheets.Add("Sheet1");
                var cells = worksheet.get_Cells();
                var currentRow=1 ;
                /*-------HEADER PART -------*/
                var cell = cells.get_Item(currentRow,1);
                cell.set_Value("Customer Name");
                cell=null;
                cell = cells.get_Item(currentRow,2);
                cell.set_Value("Customer Address");
                /*-------HEADER PART END-------*/
                /*-------RECORD 1-------*/
                currentRow=2;
                cell= cells.get_Item(currentRow, 1);
                cell.set_Value("ABCD Trading");
                cell= null;
                cell= cells.get_Item(currentRow, 2);
                cell.set_Value("ABCD Complex, P.O Box :xxxxxx, XYZ Street");
                /*-------RECORD 1 END-------*/
                /*-------RECORD 2-------*/
                currentRow=3;
                cell= cells.get_Item(currentRow, 1);
                cell.set_Value("XYZ Trading");
                cell = null;
                cell = cells.get_Item(currentRow, 2);
                cell.set_Value("XYZ Complex, P.O Box :xxxxxx, ABC Street");
                /*-------RECORD 2 END-------*/
                package.Save();
            }
            memoryStream.Seek(0,System.IO.SeekOrigin::Begin);
            //Download the file.
            DocuFileSave::processSaveResult(memoryStream,saveResult);
        }
    }
}