This example shows how to read an existing PDF document and insert a background image into every page.

We start by reading our template PDF document and finding out core information we will need to reference each page.

Set theDoc = Server.CreateObject("ABCpdf3.Doc")
theDoc.Read "c:\mypics\sample.pdf"
theCount = theDoc.PageCount


We cycle through the pages inserting images as we go.

We set the layer property to ensure that the image gets added in the background rather than on top of existing content.

The first time we add an image file. Subsequent times we reference the image ID. This means that we embed only one copy of the image data and simply reference that data from each page.

Finally we save the modified PDF.

For i = 1 To theCount
  theDoc.PageNumber = i
  theDoc.Layer = theDoc.LayerCount + 1
  If i = 1 Then
    theID = theDoc.AddImage("c:\mypics\light.jpg")
  Else
    theDoc.AddImage theID
  End If
Next
theDoc.Save "c:\mypdfs\watermark.pdf"

Given the following document.

sample.pdf [Page 1]	sample.pdf [Page 2]
sample.pdf [Page 3]	sample.pdf [Page 4]

And the following image.

This is the kind of output you might expect.

watermark.pdf [Page 1]	watermark.pdf [Page 2]
watermark.pdf [Page 3]	watermark.pdf [Page 4]