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 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 If htmlToPdfConverter.PdfSecurityOptions.UserPassword IsNot Nothing AndAlso htmlToPdfConverter.PdfSecurityOptions.UserPassword.Length > 0 AndAlso (htmlToPdfConverter.PdfSecurityOptions.OwnerPassword Is Nothing OrElse htmlToPdfConverter.PdfSecurityOptions.OwnerPassword.Length = 0 OrElse htmlToPdfConverter.PdfSecurityOptions.UserPassword = htmlToPdfConverter.PdfSecurityOptions.OwnerPassword) Then ' A user password is set but the owner password is not set or is identical to user password ' Set a different owner password htmlToPdfConverter.PdfSecurityOptions.OwnerPassword = htmlToPdfConverter.PdfSecurityOptions.UserPassword & "_owner" End If ' Set PDF document permissions htmlToPdfConverter.PdfSecurityOptions.CanPrint = printEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanCopyContent = copyContentEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanEditContent = editContentEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanEditAnnotations = editAnnotationsEnabledCheckBox.Checked htmlToPdfConverter.PdfSecurityOptions.CanFillFormFields = fillFormFieldsEnabledCheckBox.Checked 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