I have found this:

http://www.html-to-pdf.net

It works. It allows you to convert a URL to a PDF file. There is only one DLL to add as a reference to your project. Basically, you can build a class similar to something like this:

Imports ExpertPdf.HtmlToPdf
Imports System.IO

Namespace Framework

    Public Class PDF

        Public cFile As String = ""
        Public cMessage As String = ""
        Public cURL As String = ""
        Public oApp As Framework.App = Nothing
        Private oProcess As Framework.LXProcess = Nothing

        ' This is when we access the class in a desktop mode
        Sub New(ByVal toApplication As Framework.App)
            oApp = toApplication
        End Sub

        ' This is when we access the class in a Web or Web Service mode
        Public Sub New(ByVal toProcess As Framework.LXProcess)
            oProcess = toProcess
            oApp = oProcess.oApp
        End Sub

        ' Generate the PDF file
        Public Function GeneratePDF() As Boolean
            Dim llSuccess As Boolean = False
            Dim loDownloadBytes() As Byte = Nothing
            Dim loFileStream As FileStream = Nothing
            Dim loPDFConverter As PdfConverter = New PdfConverter

            ' Reset the values
            cMessage = ""

            Try

                loPDFConverter.PdfDocumentOptions.PdfPageSize = PdfPageSize.A4
                loPDFConverter.PdfDocumentOptions.PdfCompressionLevel = PdfCompressionLevel.Normal
                loPDFConverter.PdfDocumentOptions.ShowHeader = False
                loPDFConverter.PdfDocumentOptions.ShowFooter = False
                loPDFConverter.PdfDocumentOptions.LeftMargin = 5
                loPDFConverter.PdfDocumentOptions.RightMargin = 5
                loPDFConverter.PdfDocumentOptions.TopMargin = 5
                loPDFConverter.PdfDocumentOptions.BottomMargin = 5
                loPDFConverter.PdfDocumentOptions.GenerateSelectablePdf = True

                loPDFConverter.PdfDocumentOptions.ShowHeader = False
                loPDFConverter.PdfHeaderOptions.HeaderText = ""
                loPDFConverter.PdfHeaderOptions.HeaderTextColor = Drawing.Color.Blue
                loPDFConverter.PdfHeaderOptions.DrawHeaderLine = False

                loPDFConverter.PdfFooterOptions.FooterText = ""
                loPDFConverter.PdfFooterOptions.FooterTextColor = Drawing.Color.Blue
                loPDFConverter.PdfFooterOptions.DrawFooterLine = False
                loPDFConverter.PdfFooterOptions.PageNumberText = "Page"
                loPDFConverter.PdfFooterOptions.ShowPageNumber = True

                'loPDFConverter.LicenseKey = "put your serial number here"
                loDownloadBytes = loPDFConverter.GetPdfFromUrlBytes(cURL)

                ' Create a file and write the byte data to a file.
                loFileStream = New System.IO.FileStream(cFile, System.IO.FileMode.Create)
                loFileStream.Write(loDownloadBytes, 0, loDownloadBytes.Length)
                loFileStream.Close()

                llSuccess = True

            Catch loError As Exception
                cMessage = loError.Message
            End Try

            Return llSuccess
        End Function

    End Class

End Namespace

And, then, you can call it like this:

        Dim loPDF As Framework.Framework.PDF = New Framework.Framework.PDF(oApp)

        loPDF.cURL = "http://www.levelextreme.com"
        loPDF.cFile = "d:\Test.pdf"
        If Not loPDF.GeneratePDF() Then
            MessageBox.Show(loPDF.cMessage)
            Exit Sub
        End If

The tool seems to generate the PDF as is. I have not taken the time to analyze all the details, but the HTML in the browser seems to be what is generated as a PDF.

The licensing however, is something else. You may take a look at http://www.html-to-pdf.net/Pricing.aspx for the information.

I would like to know if someone else already used that one. Any related comment would be appreciated.