How to merge cells in J#.NET

package Tutorial10;

/* -------------------------------------------------------------------------------
 * Tutorial 10
 * 
 * This tutorial shows how to export an Excel file with a merged cell range in J#.
 * ------------------------------------------------------------------------------- */

import System.*;
import EasyXLS.*;

public class Tutorial10
{
    public Tutorial10()
    {
    }

    /** @attribute System.STAThread() */
    public static void main(String[] args)
    {
        Console.WriteLine("Tutorial 10\n----------\n");

        // Create an instance of the class that exports Excel files
        ExcelDocument workbook = new ExcelDocument(1);
           
        // Get the table of data for the worksheet
        ExcelTable xlsTable = ((ExcelWorksheet)workbook.easy_getSheet("Sheet1")).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("\nError encountered: " + sError + "\nPress Enter to Exit...");

        // Dispose memory
        workbook.Dispose();

        Console.ReadLine();
    }
}