How to read XLS file in C++.NET

/*----------------------------------------------------------------------------
 | Tutorial 37
 |
 | This tutorial shows how to read an Excel XLS file in C++.NET (the
 | XLS file generated by Tutorial 28 as base template), modify
 | some data and save it to another XLS file (Tutorial37 - read XLS file.xls).
 ---------------------------------------------------------------------------*/

using namespace System;
using namespace EasyXLS;
using namespace System::Data;
using namespace System::IO;

int main()
{
    Console::WriteLine("Tutorial 37\n----------\n");

    // Create an instance of the class that reads Excel files
    ExcelDocument ^workbook = gcnew ExcelDocument();

    // Read XLS file
    Console::WriteLine("Reading file C:\\Samples\\Tutorial28.xls.\n");
    if (workbook->easy_LoadXLSFile("C:\\Samples\\Tutorial28.xls"))
    {
        // Get the table of data for the second worksheet
        ExcelWorksheet ^xlsSecondTab = safe_cast<ExcelWorksheet^>(workbook->easy_getSheetAt(1));
        ExcelTable ^xlsSecondTable = xlsSecondTab->easy_getExcelTable();

        // Write some data to the second sheet
        xlsSecondTable->easy_getCell("A1")->setValue("Data added by Tutorial37");
        for (int column=0; column<5; column++)
        {
            xlsSecondTable->easy_getCell(1, column)->setValue(String::Concat("Data ", (column + 1).ToString()));
        }

        // Export the new XLS file
        Console::WriteLine("Writing file C:\\Samples\\Tutorial37 - read XLS file.xls.");
        workbook->easy_WriteXLSFile("C:\\Samples\\Tutorial37 - read XLS file.xls");

        // Confirm export of Excel file
        String ^sError = workbook->easy_getError();
        if (sError->Equals(""))
            Console::Write("\nFile successfully created. Press Enter to Exit...");
        else
            Console::Write(String::Concat("\nError encountered: ", sError, "\nPress Enter to Exit..."));
    }
    else
    {
        Console::WriteLine(String::Concat("\nError reading file C:\\Samples\\Tutorial28.xls \n", 
            workbook->easy_getError(), "\nPress Enter to Exit..."));
    }

    // Dispose memory
    delete workbook;

    Console::ReadLine();

    return 0;
}