The sample demonstrates how to Set Word styles.

private void button1_Click(object sender, EventArgs e)
{
    //Create word document
    Document document = new Document();

    //Create a new secition
    Section section = document.AddSection();

    //Create a new paragraph
    Paragraph paragraph = section.AddParagraph();

    //Append Text
    paragraph.AppendText("Builtin Style:");

    foreach (BuiltinStyle builtinStyle in Enum.GetValues(typeof(BuiltinStyle)))
    {
        paragraph = section.AddParagraph();
        //Append Text
        paragraph.AppendText(builtinStyle.ToString());
        //Apply Style
        paragraph.ApplyStyle(builtinStyle);
    }

    //Save doc file.
    document.SaveToFile("Sample.doc",FileFormat.Doc);

    //Launching the MS Word file.
    WordDocViewer("Sample.doc");


}

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

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
	'Create word document
	Dim document_Renamed As New Document()

	'Create a new secition
	Dim section_Renamed As Section = document_Renamed.AddSection()

	'Create a new paragraph
	Dim paragraph_Renamed As Paragraph = section_Renamed.AddParagraph()

	'Append Text
	paragraph_Renamed.AppendText("Builtin Style:")

	For Each builtinStyle_Renamed As BuiltinStyle In System.Enum.GetValues(GetType(BuiltinStyle))
		paragraph_Renamed = section_Renamed.AddParagraph()
		'Append Text
		paragraph_Renamed.AppendText(builtinStyle_Renamed.ToString())
		'Apply Style
		paragraph_Renamed.ApplyStyle(builtinStyle_Renamed)
	Next builtinStyle_Renamed

	'Save doc file.
	document_Renamed.SaveToFile("Sample.doc",FileFormat.Doc)

	'Launching the MS Word file.
	WordDocViewer("Sample.doc")


End Sub

Private Sub WordDocViewer(ByVal fileName As String)
	Try
		Process.Start(fileName)
	Catch
	End Try
End Sub

The sample demonstrates how to replace one word to another in a Word document.

private void button1_Click(object sender, EventArgs e)
{
    //Create word document
    Document document = new Document();
    document.LoadFromFile(@"..\..\..\..\..\..\Data\FindAndReplace.doc");

    //Replace text
    document.Replace(this.textBox1.Text, this.textBox2.Text,true,true);

    //Save doc file.
    document.SaveToFile("Sample.doc", FileFormat.Doc);

    //Launching the MS Word file.
    WordDocViewer("Sample.doc");
}

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

 Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
	'Create word document
	Dim document_Renamed As New Document()
	document_Renamed.LoadFromFile("..\..\..\..\..\..\Data\FindAndReplace.doc")

	'Replace text
	document_Renamed.Replace(Me.textBox1.Text, Me.textBox2.Text,True,True)

	'Save doc file.
	document_Renamed.SaveToFile("Sample.doc", FileFormat.Doc)

	'Launching the MS Word file.
	WordDocViewer("Sample.doc")
End Sub

Private Sub WordDocViewer(ByVal fileName As String)
	Try
		Process.Start(fileName)
	Catch
	End Try
End Sub

The sample demonstrates how to find and highlight specified text in Word document.

private void button1_Click(object sender, EventArgs e)
{
    //Create word document
    Document document = new Document();
    document.LoadFromFile(@"..\..\..\..\..\..\Data\FindAndReplace.doc");

    //Find text
    TextSelection[] textSelections = document.FindAllString(this.textBox1.Text, true, true);

    //Set hightlight
    foreach(TextSelection selection in textSelections)
    {
        selection.GetAsOneRange().CharacterFormat.HighlightColor = Color.Yellow;
    }

    //Save doc file.
    document.SaveToFile("Sample.doc", FileFormat.Doc);

    //Launching the MS Word file.
    WordDocViewer("Sample.doc");
}

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

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
	'Create word document
	Dim document_Renamed As New Document()
	document_Renamed.LoadFromFile("..\..\..\..\..\..\Data\FindAndReplace.doc")

	'Find text
	Dim textSelections() As TextSelection = document_Renamed.FindAllString(Me.textBox1.Text, True, True)

	'Set hightlight
	For Each selection As TextSelection In textSelections
		selection.GetAsOneRange().CharacterFormat.HighlightColor = Color.Yellow
	Next selection

	'Save doc file.
	document_Renamed.SaveToFile("Sample.doc", FileFormat.Doc)

	'Launching the MS Word file.
	WordDocViewer("Sample.doc")
End Sub

Private Sub WordDocViewer(ByVal fileName As String)
	Try
		Process.Start(fileName)
	Catch
	End Try
End Sub

The sample demonstrates how to edit a Word document.

  private void button1_Click(object sender, EventArgs e)
{
    //Create word document
    Document document = new Document();
    document.LoadFromFile(@"..\..\..\..\..\..\Data\Editing.doc");

    //Get a paragraph
    Paragraph paragraph = document.Sections[0].AddParagraph();

    //Append Text
    paragraph.AppendText("Editing sample");

    //Save doc file.
    document.SaveToFile("Sample.doc", FileFormat.Doc);

    //Launching the MS Word file.
    WordDocViewer("Sample.doc");
}

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

    Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
	'Create word document
	Dim document_Renamed As New Document()
	document_Renamed.LoadFromFile("..\..\..\..\..\..\Data\Editing.doc")

	'Get a paragraph
	Dim paragraph_Renamed As Paragraph = document_Renamed.Sections(0).AddParagraph()

	'Append Text
	paragraph_Renamed.AppendText("Editing sample")

	'Save doc file.
	document_Renamed.SaveToFile("Sample.doc", FileFormat.Doc)

	'Launching the MS Word file.
	WordDocViewer("Sample.doc")
End Sub

Private Sub WordDocViewer(ByVal fileName As String)
	Try
		Process.Start(fileName)
	Catch
	End Try
End Sub

The sample demonstrates how to write a "Hello World" in a Word document.

private void button1_Click(object sender, EventArgs e)
{
    //Create word document
    Document document = new Document();

    //Create a new paragraph
    Paragraph paragraph = document.AddSection().AddParagraph();

    //Append Text
    paragraph.AppendText("Hello World!");

    //Save doc file.
    document.SaveToFile("Sample.doc", FileFormat.Doc);

    //Launching the MS Word file.
    WordDocViewer("Sample.doc");
}

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

Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles button1.Click
	'Create word document
	Dim document_Renamed As New Document()

	'Create a new paragraph
	Dim paragraph_Renamed As Paragraph = document_Renamed.AddSection().AddParagraph()

	'Append Text
	paragraph_Renamed.AppendText("Hello World!")

	'Save doc file.
	document_Renamed.SaveToFile("Sample.doc",FileFormat.Doc)

	'Launching the MS Word file.
	WordDocViewer("Sample.doc")


End Sub

Private Sub WordDocViewer(ByVal fileName As String)
	Try
		Process.Start(fileName)
	Catch
	End Try
End Sub

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

		private void btnRun_Click(object sender, System.EventArgs e)
		{
			Workbook workbook = new Workbook();
			Worksheet sheet = workbook.Worksheets[0];
			workbook.Version = ExcelVersion.Version2007;


			int maxColor = Enum.GetValues(typeof(ExcelColors)).Length;
			Random random = new Random((int)System.DateTime.Now.Ticks);
			for (int i = 2; i < 40; i++)
			{
                
			ExcelColors backKnownColor = (ExcelColors)(random.Next(1,maxColor / 2));

			sheet.Range["A1"].Text = "Color Name";
			sheet.Range["B1"].Text = "Red";
			sheet.Range["C1"].Text = "Green";
			sheet.Range["D1"].Text = "Blue";
			sheet.Range["E1:K1"].Merge();
			sheet.Range["E1:K1"].Text = "Gradient";
			sheet.Range["A1:K1"].Style.Font.IsBold = true;
			sheet.Range["A1:K1"].Style.Font.Size = 11;

			string colorName = backKnownColor.ToString();
			sheet.Range[string.Format("A{0}",i)].Text = colorName;
			sheet.Range[string.Format("B{0}", i)].Text = workbook.GetPaletteColor(backKnownColor).R.ToString();
			sheet.Range[string.Format("C{0}", i)].Text = workbook.GetPaletteColor(backKnownColor).G.ToString();
			sheet.Range[string.Format("D{0}", i)].Text = workbook.GetPaletteColor(backKnownColor).B.ToString();

			sheet.Range[string.Format("E{0}:K{0}",i)].Merge();
			sheet.Range[string.Format("E{0}:K{0}", i)].Text = colorName;
			sheet.Range[string.Format("E{0}:K{0}", i)].Style.Interior.FillPattern = ExcelPatternType.Gradient;
			sheet.Range[string.Format("E{0}:K{0}", i)].Style.Interior.Gradient.BackKnownColor = backKnownColor;
			sheet.Range[string.Format("E{0}:K{0}", i)].Style.Interior.Gradient.ForeKnownColor = ExcelColors.White;
			sheet.Range[string.Format("E{0}:K{0}", i)].Style.Interior.Gradient.GradientStyle = GradientStyleType.Vertical;
			sheet.Range[string.Format("E{0}:K{0}", i)].Style.Interior.Gradient.GradientVariant = GradientVariantsType.ShadingVariants1;
			}

			sheet.AutoFitColumn(1);
		
			workbook.SaveToFile("Sample.xlsx");

			ExcelDocViewer(workbook.FileName);
		}

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

		Private Sub btnRun_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnRun.Click
			Dim workbook As New Workbook()
			Dim sheet As Worksheet = workbook.Worksheets(0)

			workbook.Version = ExcelVersion.Version2007


			Dim maxColor As Integer = System.Enum.GetValues(GetType(ExcelColors)).Length
            Dim random As New Random()
			For i As Integer = 2 To 39

				Dim backKnownColor As ExcelColors = CType(random.Next(1,maxColor \ 2), ExcelColors)

				sheet.Range("A1").Text = "Color Name"
				sheet.Range("B1").Text = "Red"
				sheet.Range("C1").Text = "Green"
				sheet.Range("D1").Text = "Blue"
				sheet.Range("E1:K1").Merge()
				sheet.Range("E1:K1").Text = "Gradient"
				sheet.Range("A1:K1").Style.Font.IsBold = True
				sheet.Range("A1:K1").Style.Font.Size = 11

				Dim colorName As String = backKnownColor.ToString()
				sheet.Range(String.Format("A{0}",i)).Text = colorName
				sheet.Range(String.Format("B{0}", i)).Text = workbook.GetPaletteColor(backKnownColor).R.ToString()
				sheet.Range(String.Format("C{0}", i)).Text = workbook.GetPaletteColor(backKnownColor).G.ToString()
				sheet.Range(String.Format("D{0}", i)).Text = workbook.GetPaletteColor(backKnownColor).B.ToString()

				sheet.Range(String.Format("E{0}:K{0}",i)).Merge()
				sheet.Range(String.Format("E{0}:K{0}", i)).Text = colorName
				sheet.Range(String.Format("E{0}:K{0}", i)).Style.Interior.FillPattern = ExcelPatternType.Gradient
				sheet.Range(String.Format("E{0}:K{0}", i)).Style.Interior.Gradient.BackKnownColor = backKnownColor
				sheet.Range(String.Format("E{0}:K{0}", i)).Style.Interior.Gradient.ForeKnownColor = ExcelColors.White
				sheet.Range(String.Format("E{0}:K{0}", i)).Style.Interior.Gradient.GradientStyle = GradientStyleType.Vertical
				sheet.Range(String.Format("E{0}:K{0}", i)).Style.Interior.Gradient.GradientVariant = GradientVariantsType.ShadingVariants1
			Next i

			sheet.AutoFitColumn(1)

			workbook.SaveToFile("Sample.xlsx")

			ExcelDocViewer(workbook.FileName)
		End Sub

		private void btnRun_Click(object sender, System.EventArgs e)
		{
			Workbook workbook = new Workbook();

			workbook.LoadFromFile(@"..\..\..\..\..\..\Data\MarkerDesignerSample.xlsx", ExcelVersion.Version2007);
			DataTable dt = (DataTable)dataGrid1.DataSource;
 
			Worksheet sheet = workbook.Worksheets[0];

			workbook.MarkerDesigner.AddParameter("Variable1", 1234.5678);
			workbook.MarkerDesigner.AddDataTable("Country", dt);
 			workbook.MarkerDesigner.Apply();

			sheet.AllocatedRange.AutoFitRows();
			sheet.AllocatedRange.AutoFitColumns(); ;
    

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

		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 New Workbook()

			workbook.LoadFromFile("..\..\..\..\..\..\Data\MarkerDesignerSample.xlsx",ExcelVersion.Version2007)
			Dim dt As DataTable = CType(dataGrid1.DataSource, DataTable)

			Dim sheet As Worksheet = workbook.Worksheets(0)

			workbook.MarkerDesigner.AddParameter("Variable1",1234.5678)
			workbook.MarkerDesigner.AddDataTable("Country",dt)
			workbook.MarkerDesigner.Apply()

			sheet.AllocatedRange.AutoFitRows()
			sheet.AllocatedRange.AutoFitColumns()


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

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

		private void btnRun_Click(object sender, System.EventArgs e)
		{
			Workbook workbook = new Workbook();
			
			workbook.LoadFromFile(@"..\..\..\..\..\..\Data\MarkerDesignerSample.xls");
			DataTable dt = (DataTable)dataGrid1.DataSource;

			Worksheet sheet = workbook.Worksheets[0];

			workbook.MarkerDesigner.AddParameter("Variable1",1234.5678);
			workbook.MarkerDesigner.AddDataTable("Country",dt);
			workbook.MarkerDesigner.Apply();

			sheet.AllocatedRange.AutoFitRows();
			sheet.AllocatedRange.AutoFitColumns();;

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

		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()

			workbook.LoadFromFile("..\..\..\..\..\..\Data\MarkerDesignerSample.xls")
			Dim dt As DataTable = CType(dataGrid1.DataSource, DataTable)

			Dim sheet As Worksheet = workbook.Worksheets(0)

			workbook.MarkerDesigner.AddParameter("Variable1",1234.5678)
			workbook.MarkerDesigner.AddDataTable("Country",dt)
			workbook.MarkerDesigner.Apply()

			sheet.AllocatedRange.AutoFitRows()
			sheet.AllocatedRange.AutoFitColumns()


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

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

		private void btnRun_Click(object sender, System.EventArgs e)
		{
			Workbook workbook = new Workbook();

			Worksheet sheet = workbook.Worksheets[0];
			sheet.Range["C10"].Style.KnownColor = ExcelColors.Gray25Percent;
			sheet.Range["C11"].Style.KnownColor= ExcelColors.Blue;
			sheet.Range["C11"].Style.KnownColor = ExcelColors.Gold;

			workbook.SaveAsXml("sample.xml");

			System.Diagnostics.Process.Start(Path.Combine(Application.StartupPath,"Sample.xml"));
		}

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

			Dim sheet As Worksheet = workbook.Worksheets(0)
			sheet.Range("C10").Style.KnownColor = ExcelColors.Gray25Percent
			sheet.Range("C11").Style.KnownColor= ExcelColors.Blue
			sheet.Range("C11").Style.KnownColor = ExcelColors.Gold

			workbook.SaveAsXml("sample.xml")

			System.Diagnostics.Process.Start(Path.Combine(Application.StartupPath,"Sample.xml"))
		End Sub

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

		private void btnRun_Click(object sender, System.EventArgs e)
		{
			Workbook workbook = new Workbook();
			Worksheet sheet = workbook.Worksheets[0];

			sheet.Range["C10"].Text = "The sample demonstrates how to save an excel workbook to stream.";

			//Save an excel workbook to stream
			FileStream fileStream = new FileStream("Sample.xls",FileMode.Create);
			workbook.SaveToStream(fileStream);

			fileStream.Close();

			ExcelDocViewer(Path.Combine(Application.StartupPath,"Sample.xls"));
		}

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

		Private Sub btnRun_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnRun.Click
			Dim workbook As Workbook = New Workbook()
			Dim sheet As Worksheet = workbook.Worksheets(0)

			sheet.Range("C10").Text = "The sample demonstrates how to save an excel workbook to stream."

			'Save an excel workbook to stream
			Dim fileStream As FileStream = New FileStream("Sample.xls",FileMode.Create)
			workbook.SaveToStream(fileStream)

			fileStream.Close()

			ExcelDocViewer(Path.Combine(Application.StartupPath,"Sample.xls"))
		End Sub