Create Watermark on Page

Hi
I am using VB.NET and I am trying to create a watermark on a existing document that has a header and footer. I looked through the forums and found the following post:
"Shape behind text per-page" by dchipping on 02-21-2007, 3:53 PM
This seems to be what I am looking for but I am not getting the expected results. I had to convert the code from C# to VB and according to my knowledge it should be correct. When I run this code it creates the text in the middle of the page as normal text, not the expected watermark and it creates the same text in a paragraph after the header.
The shape that should be the watermark is blank on my document and I loose the existing header and footer.
Here is my code:

Private Sub btnProcess_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcess.Click
    Dim doc As New Document("C:\mydoc.doc")
    InsertWatermark(doc, "Some Text", "Some Text")
    doc.Save("C:\mydoc.doc", SaveFormat.Doc)

End Sub
'=========================================================================================
Private Shared Sub InsertWatermark(ByVal doc As Document, ByVal text As String, ByVal html As String)
    Dim builder As New DocumentBuilder(doc)
    builder.MoveToDocumentEnd()

    'move to document end 
    builder.MoveToHeaderFooter(HeaderFooterType.HeaderPrimary)
    'Move to header 
    'Prepare and insert watermark 
    Dim shape As New Shape(doc, ShapeType.TextFadeRight)

    With shape
        .FillColor = Color.Black
        .Rotation = 315
        .Width = 400
        .Height = 400
        .WrapType = 3
        .WrapSide = WrapSide.Both
        .RelativeHorizontalPosition = RelativeHorizontalPosition.Page
        .HorizontalAlignment = Aspose.Words.Drawing.HorizontalAlignment.Center
        .RelativeVerticalPosition = RelativeVerticalPosition.Page
        .VerticalAlignment = VerticalAlignment.Center

    End With
    Dim para As New Paragraph(doc)
    Dim run As New Run(doc)
    Dim node As Node = builder.CurrentNode
    run.Text = text
    run.Font.Color = System.Drawing.Color.Red
    para.AppendChild(run)
    shape.BehindText = True
    shape.PrependChild(para)
    builder.InsertNode(shape)

    'move to document end 
    builder.MoveToDocumentEnd()
    'Insert text 
    builder.InsertHtml(html)
    builder.InsertBreak(BreakType.SectionBreakNewPage)
    builder.CurrentSection.DeleteHeaderFooterShapes()
    builder.CurrentSection.HeadersFooters.LinkToPrevious(False)

End Sub

Please advise
Thanks

Hi

Thanks for your inquiry. Please try using code provided in the following article to insert watermark into the document:
https://docs.aspose.com/words/net/working-with-watermark/
Hope this helps.
Best regards.