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 an adddional delay in seconds to wait for JavaScript or AJAX calls after page load completed ' Set this property to 0 if you don't need to wait for such asynchcronous operations to finish htmlToPdfConverter.ConversionDelay = 2 ' Set the encryption algorithm and the encryption key size if they are not the default ones If (Not bit128RadioButton.Checked Or Not rc4RadioButton.Checked) Then ' set the encryption algorithm If (rc4RadioButton.Checked) Then htmlToPdfConverter.PdfSecurityOptions.EncryptionAlgorithm = EncryptionAlgorithm.RC4 Else htmlToPdfConverter.PdfSecurityOptions.EncryptionAlgorithm = EncryptionAlgorithm.AES End If ' set the encryption key size If (bit40RadioButton.Checked) Then htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey40Bit ElseIf (bit128RadioButton.Checked) Then htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey128Bit ElseIf (bit256RadioButton.Checked) Then htmlToPdfConverter.PdfSecurityOptions.KeySize = EncryptionKeySize.EncryptKey256Bit End If End If ' Set user and owner passwords If userPasswordTextBox.Text.Length > 0 Then htmlToPdfConverter.PdfSecurityOptions.UserPassword = userPasswordTextBox.Text End If If ownerPasswordTextBox.Text.Length > 0 Then htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = ownerPasswordTextBox.Text End If ' Set PDF document permissions htmlToPdfConverter.PdfSecurityOptions.CanPrint = printEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanPrintHighResolution = highResolutionPrintEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanCopyContent = copyContentEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanCopyAccessibilityContent = copyAccessibilityContentEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanEditContent = editContentEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanEditAnnotations = editAnnotationsEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanFillFormFields = fillFormFieldsEnabledCheckBox.Checked If ((PermissionsChanged(htmlToPdfConverter) Or htmlToPdfConverter.PdfSecurityOptions.UserPassword.Length > 0) And htmlToPdfConverter.PdfSecurityOptions.OwnerPassword.Length = 0) Then ' A user password is set but the owner password is not set or the permissions are not the default ones ' Set a default owner password htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = "owner" End If Cursor = Cursors.WaitCursor ' Convert HTML to PDF using the settings above Dim outPdfFile As String = "DemoAppFiles\Output\HTML_to_PDF\Set_Permissions_Password.pdf" Try ' Convert the HTML page to a PDF document in a memory buffer Dim outPdfBuffer() As Byte = htmlToPdfConverter.ConvertUrl(urlTextBox.Text) ' 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