How to merge cells in C++.NET

/*-------------------------------------------------------------------------------------
 | Tutorial 10
 |
 | This tutorial shows how to export an Excel file with a merged cell range in C++.NET.
 --------------------------------------------------------------------------------------*/

using namespace System;
using namespace EasyXLS;

int main()
{
    Console::WriteLine("Tutorial 10\n----------\n");

    // Create an instance of the class that exports Excel files
    ExcelDocument ^workbook = gcnew ExcelDocument(1);

    // Get the table of data for the worksheet
    ExcelWorksheet ^xlsFirstTab = safe_cast<ExcelWorksheet^>(workbook->easy_getSheet("Sheet1"));
    ExcelTable ^xlsTable = xlsFirstTab->easy_getExcelTable();

    // Merge cells by range
    xlsTable->easy_mergeCells("A1:C3");

    // Export Excel file
    Console::WriteLine("Writing file C:\\Samples\\Tutorial10 - merge cells in Excel.xlsx.");
    workbook->easy_WriteXLSXFile("C:\\Samples\\Tutorial10 - merge cells in Excel.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;
}