Private Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs) Handles convertToPdfButton.Click ' Create a PDF document Dim pdfDocument As New Document() ' Set license key received after purchase to use the converter in licensed mode ' Leave it not set to use the converter in demo mode pdfDocument.LicenseKey = "fvDh8eDx4fHg4P/h8eLg/+Dj/+jo6Og=" ' Add a page to PDF document Dim pdfPage As PdfPage = pdfDocument.AddPage() ' 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 pdfDocument.Security.EncryptionAlgorithm = EncryptionAlgorithm.RC4 Else pdfDocument.Security.EncryptionAlgorithm = EncryptionAlgorithm.AES End If ' set the encryption key size If (bit40RadioButton.Checked) Then pdfDocument.Security.KeySize = EncryptionKeySize.EncryptKey40Bit ElseIf (bit128RadioButton.Checked) Then pdfDocument.Security.KeySize = EncryptionKeySize.EncryptKey128Bit ElseIf (bit256RadioButton.Checked) Then pdfDocument.Security.KeySize = EncryptionKeySize.EncryptKey256Bit End If End If ' Set user and owner passwords If userPasswordTextBox.Text.Length > 0 Then pdfDocument.Security.UserPassword = userPasswordTextBox.Text End If If ownerPasswordTextBox.Text.Length > 0 Then pdfDocument.Security.OwnerPassword = ownerPasswordTextBox.Text End If ' Set PDF document permissions pdfDocument.Security.CanPrint = printEnabledCheckBox.Checked pdfDocument.Security.CanPrintHighResolution = highResolutionPrintEnabledCheckBox.Checked pdfDocument.Security.CanCopyContent = copyContentEnabledCheckBox.Checked pdfDocument.Security.CanCopyAccessibilityContent = copyAccessibilityContentEnabledCheckBox.Checked pdfDocument.Security.CanEditContent = editContentEnabledCheckBox.Checked pdfDocument.Security.CanEditAnnotations = editAnnotationsEnabledCheckBox.Checked pdfDocument.Security.CanFillFormFields = fillFormFieldsEnabledCheckBox.Checked If ((PermissionsChanged(pdfDocument) Or pdfDocument.Security.UserPassword.Length > 0) And pdfDocument.Security.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 pdfDocument.Security.OwnerPassword = "owner" End If Cursor = Cursors.WaitCursor Dim outPdfFile As String = "DemoAppFiles\Output\PDF_Creator\Set_Permissions_Password.pdf" Try ' Create a HTML to PDF element to add to document Dim htmlToPdfElement As New HtmlToPdfElement(urlTextBox.Text) ' Optionally set a delay before conversion to allow asynchonous scripts to finish htmlToPdfElement.ConversionDelay = 2 ' Add the HTML to PDF element to document pdfPage.AddElement(htmlToPdfElement) ' Save the PDF document in a memory buffer Dim outPdfBuffer() As Byte = pdfDocument.Save() ' Write the memory buffer in a PDF file System.IO.File.WriteAllBytes(outPdfFile, outPdfBuffer) Catch ex As Exception ' The PDF creation failed MessageBox.Show(String.Format("Create PDF Document Error. {0}", ex.Message)) Return Finally ' Close the PDF document pdfDocument.Close() 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