Private Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles convertToPdfButton.Click ' Create a HTML to PDF converter object with default settings Dim htmlToPdfConverter As New HtmlToPdfConverter() ' Set license key received after purchase to use the converter in licensed mode ' Leave it not set to use the converter in demo mode htmlToPdfConverter.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=" ' Set the submit buttons style htmlToPdfConverter.PdfFormOptions.SubmitButtonStyle.BackColor = Color.Beige ' Set the style of various types of text boxes htmlToPdfConverter.PdfFormOptions.TextBoxStyle.BackColor = Color.AliceBlue htmlToPdfConverter.PdfFormOptions.PasswordTextBoxStyle.BackColor = Color.MistyRose htmlToPdfConverter.PdfFormOptions.MultilineTextBoxStyle.BackColor = Color.AliceBlue ' Set the radio buttons style htmlToPdfConverter.PdfFormOptions.RadioButtonsGroupStyle.BackColor = Color.AntiqueWhite ' Set the checkboxes styles htmlToPdfConverter.PdfFormOptions.CheckBoxStyle.BackColor = Color.AntiqueWhite ' set the drop down lists style htmlToPdfConverter.PdfFormOptions.ComboBoxStyle.BackColor = Color.LightCyan Cursor = Cursors.WaitCursor Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Define_in_HTML_PDF_Form_Fields.pdf" Try Dim outPdfBuffer() As Byte = Nothing If convertHtmlRadioButton.Checked Then ' Convert a HTML string to a PDF document with form fields Dim htmlWithForm As String = htmlFormTextBox.Text outPdfBuffer = htmlToPdfConverter.ConvertHtml(htmlWithForm, String.Empty) Else ' Convert the HTML page to a PDF document with form fields Dim url As String = urlTextBox.Text outPdfBuffer = htmlToPdfConverter.ConvertUrl(url) End If ' Write the memory buffer in a PDF file System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer) Catch ex As Exception ' The HTML to PDF conversion failed MessageBox.Show(String.Format("HTML to PDF Error. {0}", ex.Message)) Return Finally Cursor = Cursors.Arrow End Try ' Open the created PDF document in default PDF viewer Try Process.Start(outPdfFile) Catch ex As Exception MessageBox.Show(String.Format("Cannot open created PDF file '{0}'. {1}", outPdfFile, ex.Message)) End Try End Sub