private void btnRun_Click(object sender, System.EventArgs e)
		{
			Workbook workbook = new Workbook();
			
			//Initialize worksheet
			workbook.CreateEmptySheets(1);
			Worksheet sheet = workbook.Worksheets[0];
			sheet.GridLinesVisible = false;

			//Writes Sample data
			CreateSampleData(sheet);

			sheet.GroupByRows(1,5,false);
			sheet.GroupByColumns(1,3,false);

			workbook.SaveToFile("Sample.xls");
			ExcelDocViewer(workbook.FileName);
		}

		private void CreateSampleData(Worksheet sheet)
		{
			//Country
			sheet.Range["A1"].Value = "Country";
			sheet.Range["A2"].Value = "Cuba";
			sheet.Range["A3"].Value = "Mexico";
			sheet.Range["A4"].Value = "France";
			sheet.Range["A5"].Value = "German";

			//Jun
			sheet.Range["B1"].Value = "Jun";
			sheet.Range["B2"].NumberValue = 6000;
			sheet.Range["B3"].NumberValue = 8000;
			sheet.Range["B4"].NumberValue = 9000;
			sheet.Range["B5"].NumberValue = 8500;

			//Aug
			sheet.Range["C1"].Value = "Aug";
			sheet.Range["C2"].NumberValue = 3000;
			sheet.Range["C3"].NumberValue = 2000;
			sheet.Range["C4"].NumberValue = 2300;
			sheet.Range["C5"].NumberValue = 4200;

			//Style
			sheet.Range["A1:C1"].Style.Font.IsBold = true;
			sheet.Range["A2:C2"].Style.KnownColor = ExcelColors.LightYellow;
			sheet.Range["A3:C3"].Style.KnownColor = ExcelColors.LightGreen1;
			sheet.Range["A4:C4"].Style.KnownColor = ExcelColors.LightOrange;
			sheet.Range["A5:C5"].Style.KnownColor = ExcelColors.LightTurquoise;

			//Border
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeTop].Color = Color.FromArgb(0, 0, 128);
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeTop].LineStyle = LineStyleType.Thin;
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeBottom].Color = Color.FromArgb(0, 0, 128);
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeBottom].LineStyle = LineStyleType.Thin;
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeLeft].Color = Color.FromArgb(0, 0, 128);
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeLeft].LineStyle = LineStyleType.Thin;
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeRight].Color = Color.FromArgb(0, 0, 128);
			sheet.Range["A1:C5"].Style.Borders[BordersLineType.EdgeRight].LineStyle = LineStyleType.Thin;

			sheet.Range["B2:C5"].Style.NumberFormat = "\"$\"#,##0";
		}

		private void ExcelDocViewer( string fileName )
		{
			try
			{
				System.Diagnostics.Process.Start(fileName);
			}
			catch{}
		}

		Private Sub btnRun_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnRun.Click
			Dim workbook As Workbook = New Workbook()

			'Initialize worksheet
			workbook.CreateEmptySheets(1)
			Dim sheet As Worksheet = workbook.Worksheets(0)
			sheet.GridLinesVisible = False

			'Writes Sample data
			CreateSampleData(sheet)

			sheet.GroupByRows(1,5,False)
			sheet.GroupByColumns(1,3,False)

			workbook.SaveToFile("Sample.xls")
			ExcelDocViewer(workbook.FileName)
		End Sub

		Private Sub CreateSampleData(ByVal sheet As Worksheet)
			'Country
			sheet.Range("A1").Value = "Country"
			sheet.Range("A2").Value = "Cuba"
			sheet.Range("A3").Value = "Mexico"
			sheet.Range("A4").Value = "France"
			sheet.Range("A5").Value = "German"

			'Jun
			sheet.Range("B1").Value = "Jun"
			sheet.Range("B2").NumberValue = 6000
			sheet.Range("B3").NumberValue = 8000
			sheet.Range("B4").NumberValue = 9000
			sheet.Range("B5").NumberValue = 8500

			'Aug
			sheet.Range("C1").Value = "Aug"
			sheet.Range("C2").NumberValue = 3000
			sheet.Range("C3").NumberValue = 2000
			sheet.Range("C4").NumberValue = 2300
			sheet.Range("C5").NumberValue = 4200

			'Style
			sheet.Range("A1:C1").Style.Font.IsBold = True
			sheet.Range("A2:C2").Style.KnownColor = ExcelColors.LightYellow
			sheet.Range("A3:C3").Style.KnownColor = ExcelColors.LightGreen1
			sheet.Range("A4:C4").Style.KnownColor = ExcelColors.LightOrange
			sheet.Range("A5:C5").Style.KnownColor = ExcelColors.LightTurquoise

			'Border
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeTop).Color = Color.FromArgb(0, 0, 128)
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeTop).LineStyle = LineStyleType.Thin
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeBottom).Color = Color.FromArgb(0, 0, 128)
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeBottom).LineStyle = LineStyleType.Thin
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeLeft).Color = Color.FromArgb(0, 0, 128)
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeLeft).LineStyle = LineStyleType.Thin
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeRight).Color = Color.FromArgb(0, 0, 128)
			sheet.Range("A1:C5").Style.Borders(BordersLineType.EdgeRight).LineStyle = LineStyleType.Thin

			sheet.Range("B2:C5").Style.NumberFormat = """$""#,##0"
		End Sub

		Private Sub ExcelDocViewer(ByVal fileName As String)
			Try
				System.Diagnostics.Process.Start(fileName)
			Catch
			End Try
		End Sub