Protected Sub convertToPdfButton_Click(ByVal sender As Object, ByVal e As EventArgs)
    ' 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

    ' Convert the HTML page to a PDF document in a memory buffer
    Dim outPdfBuffer() As Byte = htmlToPdfConverter.ConvertUrl(urlTextBox.Text)

    ' Send the PDF as response to browser

    ' Set response content type
    Response.AddHeader("Content-Type", "application/pdf")

    ' Instruct the browser to open the PDF file as an attachment or inline
    Response.AddHeader("Content-Disposition", String.Format("attachment; filename=Set_Permissions_Password.pdf; size={0}", outPdfBuffer.Length.ToString()))

    ' Write the PDF document buffer to HTTP response
    Response.BinaryWrite(outPdfBuffer)

    ' End the HTTP response and stop the current page processing
    Response.End()
End Sub