Not needing to have Microsoft Excel installed on the machine, The Spire.DataExport can create Excel spreadsheet.

private void btnRun_Click(object sender, System.EventArgs e)
{
	oleDbConnection1.Open();
	try
	{
		cellExport1.SaveToFile();
	}
	finally
	{
		this.oleDbConnection1.Close();
	}
}

private void Form1_Load(object sender, System.EventArgs e)
{
	LoadData();
}

private void button2_Click(object sender, System.EventArgs e)
{
	LoadData();
}

private void btnAbout_Click(object sender, System.EventArgs e)
{
	Close();
}

private void button1_Click(object sender, System.EventArgs e)
{
	oleDbConnection1.Open();
	try
	{
		cellExport2.SaveToFile();
	}
	finally
	{
		this.oleDbConnection1.Close();
	}
}

private void button3_Click(object sender, System.EventArgs e)
{
	oleDbConnection1.Open();
	try
	{
		cellExport3.SaveToFile();
	}
	finally
	{
		this.oleDbConnection1.Close();
	}
	
}

private void button4_Click(object sender, System.EventArgs e)
{
	oleDbConnection1.Open();
	try
	{
		cellExport4.SaveToFile();
	}
	finally
	{
		this.oleDbConnection1.Close();
	}

}

private void button5_Click(object sender, System.EventArgs e)
{
	ushort currentRow = 1;
	string currentFormula = string.Empty;

	Cell cell = null;

	cellExport5.Cells.Clear();
	cellExport5.SetColumnWidth(1, 32);
	cellExport5.SetColumnWidth(2, 16);
	cellExport5.SetColumnWidth(3, 16);

	cell = cellExport5.AddString(1,currentRow++,"Examples of formulas :");
	cell.Format.Font.Bold = true;
	cell.Format.FillStyle.Background = CellColor.LightGreen;
	cell.Format.FillStyle.Pattern = Pattern.Solid;
	cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium;

	cell = cellExport5.AddString(1,++currentRow,"Test data:");
	cell.Format.Font.Bold = true;
	cell.Format.FillStyle.Background = CellColor.LightGreen;
	cell.Format.FillStyle.Pattern = Pattern.Solid;
	cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium;
	
    //test data
	cellExport5.AddNumeric(2,currentRow, 7.3);
	cellExport5.AddNumeric(3,currentRow,5);
	cellExport5.AddNumeric(4,currentRow,8.2);
	cellExport5.AddNumeric(5,currentRow,  4);
	cellExport5.AddNumeric(6,currentRow, 3);
	cellExport5.AddNumeric(7,currentRow++, 11.3);

		
	cell = cellExport5.AddString(1,++currentRow, "Formulas");
	cell.Format.Font.Bold = true;
	cell.Format.FillStyle.Background = CellColor.LightGreen;
	cell.Format.FillStyle.Pattern = Pattern.Solid;
	cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium;

	cell = cellExport5.AddString(2,currentRow, "Results");
	cell.Format.Font.Bold = true;
	cell.Format.FillStyle.Background = CellColor.LightGreen;
	cell.Format.FillStyle.Pattern = Pattern.Solid;
	cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium;

	//str.
	currentFormula = "=\"hello\"";
	cellExport5.AddString(1, ++currentRow, currentFormula);
	cellExport5.AddFormula(2, currentRow, "=\"hello\"");			
	cellExport5.AddFormula(3, currentRow, "=\"" + new string(new char[]{'\u4f60', '\u597d'})+ "\"");			



	//int.
	currentFormula = "=300";
	cellExport5.AddString(1, ++currentRow,currentFormula);
	cellExport5.AddFormula(2,currentRow, currentFormula);			

	// float
	currentFormula = "=3389.639421";
	cellExport5.AddString(1, ++currentRow, currentFormula);			
	cellExport5.AddFormula(2,currentRow,currentFormula);

	//bool.
	currentFormula = "=false";
	cellExport5.AddString(1, ++currentRow, currentFormula);
	cellExport5.AddFormula(2, currentRow, currentFormula);

	currentFormula = "=1+2+3+4+5-6-7+8-9";
	cellExport5.AddString( 1, ++currentRow, currentFormula);
	cellExport5.AddFormula(2, currentRow, currentFormula);

	currentFormula = "=33*3/4-2+10";
	cellExport5.AddString( 1,++currentRow,currentFormula);			
	cellExport5.AddFormula(2, currentRow, currentFormula);			
	

	// sheet reference
	currentFormula = "=Sheet1!$B$3";
	cellExport5.AddString(1,++currentRow, currentFormula);			
	cellExport5.AddFormula(2,currentRow, currentFormula);

	// sheet area reference
	currentFormula = "=AVERAGE(Sheet1!$D$3:G$3)";
	cellExport5.AddString(1, ++currentRow, currentFormula);			
	cellExport5.AddFormula(2,currentRow, currentFormula);

	// Functions
	currentFormula = "=Count(3,5,8,10,2,34)";
	cellExport5.AddString(1,++currentRow,  currentFormula);			
	cellExport5.AddFormula(2,currentRow++, currentFormula);


	currentFormula = "=NOW()";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++,  currentFormula);

	currentFormula = "=SECOND(11)";
	cellExport5.AddString(1 ,currentRow, currentFormula);
	cellExport5.AddFormula(2, currentRow++, currentFormula);

	currentFormula = "=MINUTE(12)";
	cellExport5.AddString(1, currentRow,currentFormula);
	cellExport5.AddFormula(2, currentRow++, currentFormula);

	currentFormula = "=MONTH(9)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=DAY(10)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=TIME(4,5,7)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=DATE(6,4,2)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=RAND()";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=HOUR(12)";
	cellExport5.AddString(1, currentRow,currentFormula);
	cellExport5.AddFormula(2, currentRow++,  currentFormula);

	currentFormula = "=TEXT(\"world\", \"$d\")";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=MOD(5,3)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=WEEKDAY(3)";
	cellExport5.AddString(1, currentRow, currentFormula);
	cellExport5.AddFormula(2, currentRow++, currentFormula);

	currentFormula = "=YEAR(23)";
	cellExport5.AddString(1, currentRow, currentFormula);
	cellExport5.AddFormula(2, currentRow++, currentFormula);

	currentFormula = "=NOT(true)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=OR(true)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=AND(TRUE)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=VALUE(30)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=LEN(\"world\")";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=MID(\"world\",4,2)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=ROUND(7,3)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=SIGN(4)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=INT(200)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=ABS(-1.21)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=LN(15)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=EXP(20)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=SQRT(40)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=PI()";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=COS(9)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=SIN(45)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=MAX(10,30)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=MIN(5,7)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=AVERAGE(12,45)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=SUM(18,29)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=IF(4,2,2)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	currentFormula = "=SUBTOTAL(3,Sheet1!B2:E3)";
	cellExport5.AddString( 1, currentRow, currentFormula);
	cellExport5.AddFormula( 2, currentRow++, currentFormula);

	this.cellExport5.SaveToFile();
}

private void cellExport1_GetDataParams(object sender, Spire.DataExport.EventArgs.DataParamsEventArgs e)
{
	if 	((e.Sheet == 0) && (e.Col == 6))
	{
		e.FormatText = cellExport1.DataFormats.Currency;
	}
}

Private Sub btnRun_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnRun.Click
    oleDbConnection1.Open()
    Try
        cellExport1.SaveToFile()
    Finally
        Me.oleDbConnection1.Close()
    End Try
End Sub

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load
    LoadData()
End Sub

Private Sub button2_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button2.Click
    LoadData()
End Sub

Private Sub btnAbout_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnAbout.Click
    Close()
End Sub

Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button1.Click
    oleDbConnection1.Open()
    Try
        cellExport2.SaveToFile()
    Finally
        Me.oleDbConnection1.Close()
    End Try
End Sub

Private Sub button3_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button3.Click
    oleDbConnection1.Open()
    Try
        cellExport3.SaveToFile()
    Finally
        Me.oleDbConnection1.Close()
    End Try

End Sub

Private Sub button4_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button4.Click
    oleDbConnection1.Open()
    Try
        cellExport4.SaveToFile()
    Finally
        Me.oleDbConnection1.Close()
    End Try

End Sub

Private Sub button5_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles button5.Click
    Dim currentRow As Integer = 1
    Dim firstCol As UInt16 = Convert.ToUInt16(1)
    Dim secondCol As UInt16 = Convert.ToUInt16(2)
    Dim currentFormula As String = String.Empty

    Dim cell As cell = Nothing

    cellExport5.Cells.Clear()
    cellExport5.SetColumnWidth(System.Convert.ToUInt16(1), System.Convert.ToUInt16(32))
    cellExport5.SetColumnWidth(System.Convert.ToUInt16(2), System.Convert.ToUInt16(16))
    cellExport5.SetColumnWidth(System.Convert.ToUInt16(3), System.Convert.ToUInt16(16))

    cell = cellExport5.AddString(System.Convert.ToUInt16(1), System.Convert.ToUInt16(currentRow), "Examples of formulas :")
    currentRow += 1
    cell.Format.Font.Bold = True
    cell.Format.FillStyle.Background = CellColor.LightGreen
    cell.Format.FillStyle.Pattern = Pattern.Solid
    cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium

    cell = cellExport5.AddString(System.Convert.ToUInt16(1), System.Convert.ToUInt16(currentRow), "Test data:")
    currentRow += 1
    cell.Format.Font.Bold = True
    cell.Format.FillStyle.Background = CellColor.LightGreen
    cell.Format.FillStyle.Pattern = Pattern.Solid
    cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium

    'test data
    cellExport5.AddNumeric(System.Convert.ToUInt16(2), System.Convert.ToUInt16(currentRow), 7.3)
    cellExport5.AddNumeric(System.Convert.ToUInt16(3), System.Convert.ToUInt16(currentRow), 5)
    cellExport5.AddNumeric(System.Convert.ToUInt16(4), System.Convert.ToUInt16(currentRow), 8.2)
    cellExport5.AddNumeric(System.Convert.ToUInt16(5), System.Convert.ToUInt16(currentRow), 4)
    cellExport5.AddNumeric(System.Convert.ToUInt16(6), System.Convert.ToUInt16(currentRow), 3)
    cellExport5.AddNumeric(System.Convert.ToUInt16(7), System.Convert.ToUInt16(currentRow), 11.3)
    currentRow += 1
    currentRow += 1


    cell = cellExport5.AddString(Convert.ToUInt16(1), Convert.ToUInt16(currentRow), "Formulas")
    cell.Format.Font.Bold = True
    cell.Format.FillStyle.Background = CellColor.LightGreen
    cell.Format.FillStyle.Pattern = Pattern.Solid
    cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium

    cell = cellExport5.AddString(secondCol, Convert.ToUInt16(currentRow), "Results")
    currentRow += 1
    cell.Format.Font.Bold = True
    cell.Format.FillStyle.Background = CellColor.LightGreen
    cell.Format.FillStyle.Pattern = Pattern.Solid
    cell.Format.Borders.Bottom.Style = CellBorderStyle.Medium

    'str.
    currentFormula = "=""hello"""
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), "=""hello""")
    cellExport5.AddFormula(Convert.ToUInt16(3), Convert.ToUInt16(currentRow), "=""" & ChrW(20320) & ChrW(22909) + """")
    currentRow += 1



    'int.
    currentFormula = "=300"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    ' float
    currentFormula = "=3389.639421"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1


    'bool.
    currentFormula = "=false"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=1+2+3+4+5-6-7+8-9"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=33*3/4-2+10"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    ' sheet reference
    currentFormula = "=Sheet1!$B$3"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    ' sheet area reference
    currentFormula = "=AVERAGE(Sheet1!$D$3:G$3)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    ' Functions
    currentFormula = "=Count(3,5,8,10,2,34)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1


    currentFormula = "=NOW()"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=SECOND(11)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=MINUTE(12)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=MONTH(9)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=DAY(10)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=TIME(4,5,7)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=DATE(6,4,2)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=RAND()"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=HOUR(12)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=TEXT(""world"", ""$d"")"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=MOD(5,3)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=WEEKDAY(3)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=YEAR(23)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=NOT(true)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=OR(true)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=AND(TRUE)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=VALUE(30)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=LEN(""world"")"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=MID(""world"",4,2)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=ROUND(7,3)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=SIGN(4)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=INT(200)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=ABS(-1.21)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=LN(15)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=EXP(20)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=SQRT(40)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=PI()"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=COS(9)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=SIN(45)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=MAX(10,30)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=MIN(5,7)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=AVERAGE(12,45)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=SUM(18,29)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=IF(4,2,2)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1

    currentFormula = "=SUBTOTAL(3,Sheet1!B2:E3)"
    cellExport5.AddString(firstCol, Convert.ToUInt16(currentRow), currentFormula)
    cellExport5.AddFormula(secondCol, Convert.ToUInt16(currentRow), currentFormula)
    currentRow += 1
    Me.cellExport5.SaveToFile()
End Sub

Private Sub cellExport1_GetDataParams(ByVal sender As Object, ByVal e As Spire.DataExport.EventArgs.DataParamsEventArgs) Handles cellExport1.GetDataParams, cellExport3.GetDataParams
    If (e.Sheet = 0) AndAlso (e.Col = 6) Then
        e.FormatText = cellExport1.DataFormats.Currency
    End If
End Sub

The sample demonstrates how to merge two documents.

private void button1_Click(object sender, EventArgs e)
{
    string fileName = OpenFile();
    string fileMerge = OpenFile();
    if ((!string.IsNullOrEmpty(fileName)) && (!string.IsNullOrEmpty(fileMerge)))
    {
        //Create word document
        Document document = new Document();
        document.LoadFromFile(fileName,FileFormat.Doc);

        Document documentMerge = new Document();
        documentMerge.LoadFromFile(fileMerge, FileFormat.Doc);

        foreach( Section sec in documentMerge.Sections)
        {
            document.Sections.Add(sec.Clone());
        }

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

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


}

private string OpenFile()
{
    openFileDialog1.Filter = "Word Document (*.doc)|*.doc";
    openFileDialog1.Title = "Choose a document to merage";

    openFileDialog1.RestoreDirectory = true;
    if (openFileDialog1.ShowDialog() == DialogResult.OK)
    {
        return openFileDialog1.FileName;
    }

    return string.Empty;
}

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
	Dim fileName As String = OpenFile()
	Dim fileMerge As String = OpenFile()
	If ((Not String.IsNullOrEmpty(fileName))) AndAlso ((Not String.IsNullOrEmpty(fileMerge))) Then
		'Create word document
		Dim document_Renamed As New Document()
		document_Renamed.LoadFromFile(fileName,FileFormat.Doc)

		Dim documentMerge As New Document()
		documentMerge.LoadFromFile(fileMerge, FileFormat.Doc)

		For Each sec As Section In documentMerge.Sections
			document_Renamed.Sections.Add(sec.Clone())
		Next sec

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

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


End Sub

Private Function OpenFile() As String
	openFileDialog1.Filter = "Word Document (*.doc)|*.doc"
	openFileDialog1.Title = "Choose a document to merage"

	openFileDialog1.RestoreDirectory = True
	If openFileDialog1.ShowDialog() = DialogResult.OK Then
		Return openFileDialog1.FileName
	End If

	Return String.Empty
End Function

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

The sample demonstrates how to insert break.

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

    InsertBreak(document);

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

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


}

private void InsertBreak(Document document)
{
    Section section = document.AddSection();
    Paragraph paragraph = section.AddParagraph();
    paragraph.AppendText("The sample demonstrates how to insert break.");
    paragraph.ApplyStyle(BuiltinStyle.Heading2);

    section.AddParagraph();
    paragraph = section.AddParagraph();
    paragraph.AppendText("Insert new page.");
    paragraph.ApplyStyle(BuiltinStyle.Heading4);

    section = document.AddSection();
    section.BreakCode = SectionBreakType.NewPage;

    section.AddParagraph();
    paragraph = section.AddParagraph();
    paragraph.AppendText("Next page.");
    paragraph.ApplyStyle(BuiltinStyle.Heading4);

}

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()

	InsertBreak(document_Renamed)

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

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


End Sub

Private Sub InsertBreak(ByVal document_Renamed As Document)
	Dim section_Renamed As Section = document_Renamed.AddSection()
	Dim paragraph_Renamed As Paragraph = section_Renamed.AddParagraph()
	paragraph_Renamed.AppendText("The sample demonstrates how to insert break.")
	paragraph_Renamed.ApplyStyle(BuiltinStyle.Heading2)

	section_Renamed.AddParagraph()
	paragraph_Renamed = section_Renamed.AddParagraph()
	paragraph_Renamed.AppendText("Insert new page.")
	paragraph_Renamed.ApplyStyle(BuiltinStyle.Heading4)

	section_Renamed = document_Renamed.AddSection()
	section_Renamed.BreakCode = SectionBreakType.NewPage

	section_Renamed.AddParagraph()
	paragraph_Renamed = section_Renamed.AddParagraph()
	paragraph_Renamed.AppendText("Next page.")
	paragraph_Renamed.ApplyStyle(BuiltinStyle.Heading4)

End Sub

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