How to create chart in a worksheet in C++.NET

/*---------------------------------------------------------------
 | Tutorial 24
 |
 | This tutorial shows how to create an Excel file in C++.NET and
 | to create a chart in a worksheet.
 ----------------------------------------------------------------*/

using namespace System;
using namespace EasyXLS;
using namespace EasyXLS::Constants;
using namespace EasyXLS::Charts;

int main()
{
    Console::WriteLine("Tutorial 24\n----------\n");

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

    // Create an worksheet
    workbook->easy_addWorksheet("SourceData");

    // Get the table of data for the worksheet
    ExcelWorksheet ^xlsFirstTab = safe_cast<ExcelWorksheet^>(workbook->easy_getSheet("SourceData"));
    ExcelTable ^xlsTable1 = xlsFirstTab->easy_getExcelTable();

    // Add data in cells for report header
    xlsTable1->easy_getCell(0, 0)->setValue("Show Date");
    xlsTable1->easy_getCell(0, 1)->setValue("Available Places");
    xlsTable1->easy_getCell(0, 2)->setValue("Available Tickets");
    xlsTable1->easy_getCell(0, 3)->setValue("Sold Tickets");

    // Add data in cells for chart report values
    xlsTable1->easy_getCell(1, 0)->setValue("03/13/2005 00:00:00");
    xlsTable1->easy_getCell(1, 0)->setFormat(EasyXLS::Constants::Format::FORMAT_DATE);
    xlsTable1->easy_getCell(2, 0)->setValue("03/14/2005 00:00:00");
    xlsTable1->easy_getCell(2, 0)->setFormat(EasyXLS::Constants::Format::FORMAT_DATE);
    xlsTable1->easy_getCell(3, 0)->setValue("03/15/2005 00:00:00");
    xlsTable1->easy_getCell(3, 0)->setFormat(EasyXLS::Constants::Format::FORMAT_DATE);
    xlsTable1->easy_getCell(4, 0)->setValue("03/16/2005 00:00:00");
    xlsTable1->easy_getCell(4, 0)->setFormat(EasyXLS::Constants::Format::FORMAT_DATE);

    xlsTable1->easy_getCell(1, 1)->setValue("10000");
    xlsTable1->easy_getCell(2, 1)->setValue("5000");
    xlsTable1->easy_getCell(3, 1)->setValue("8500");
    xlsTable1->easy_getCell(4, 1)->setValue("1000");

    xlsTable1->easy_getCell(1, 2)->setValue("8000");
    xlsTable1->easy_getCell(2, 2)->setValue("4000");
    xlsTable1->easy_getCell(3, 2)->setValue("6000");
    xlsTable1->easy_getCell(4, 2)->setValue("1000");

    xlsTable1->easy_getCell(1, 3)->setValue("920");
    xlsTable1->easy_getCell(2, 3)->setValue("1005");
    xlsTable1->easy_getCell(3, 3)->setValue("342");
    xlsTable1->easy_getCell(4, 3)->setValue("967");

    // Set column widths
    xlsTable1->easy_getColumnAt(0)->setWidth(100);
    xlsTable1->easy_getColumnAt(1)->setWidth(100);
    xlsTable1->easy_getColumnAt(2)->setWidth(100);
    xlsTable1->easy_getColumnAt(3)->setWidth(100);

    // Create a chart
    ExcelChart ^xlsChart = gcnew ExcelChart("A10", 600, 300);
    xlsChart->easy_addSeries("=SourceData!$B$1", "=SourceData!$B$2:$B$5");
    xlsChart->easy_addSeries("=SourceData!$C$1", "=SourceData!$C$2:$C$5");
    xlsChart->easy_addSeries("=SourceData!$D$1", "=SourceData!$D$2:$D$5");
    xlsChart->easy_setCategoryXAxisLabels("=SourceData!$A$2:$A$5");

    // Add the chart to the first worksheet
    ExcelWorksheet ^xlsWorksheet = safe_cast<ExcelWorksheet^>(workbook->easy_getSheet("SourceData"));
    xlsWorksheet->easy_addChart(xlsChart);

    // Export Excel file
    Console::WriteLine("Writing file C:\\Samples\\Tutorial24 - chart inside worksheet.xlsx.");
    workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial24 - chart inside worksheet.xlsx");

    // 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..."));

    // Dispose memory
    delete workbook;

    Console::ReadLine();

    return 0;
}