Visual Basic 6.0 Requires Chilkat v11.7.0+

Tile a Watermark Across a PDF Page

See more PDF Watermark Examples

Demonstrates a tiled watermark, which repeats the stamp over the whole page instead of placing it once. Tiling overrides position.align; tile.spacingX and spacingY set the gaps, and tile.stagger offsets alternate rows by half a tile so the pattern does not line up in columns. A faint tiled stamp carrying the name or address is the usual way to mark a document so that a leaked copy can be traced back, and zOrder back keeps it behind the text where it does not hinder reading. Visual Basic 6.0

Dim success As Long
success = 0

'  This example requires the Chilkat API to have been previously unlocked.
'  See Global Unlock Sample for sample code.

'  The PDF used in this example is available at long_report.pdf

Dim pdf As New ChilkatPdf
success = pdf.LoadFile("qa_data/pdf/long_report.pdf")
If (success = 0) Then
    Debug.Print pdf.LastErrorText
    Exit Sub
End If

Dim json As New ChilkatJsonObject
success = json.UpdateString("type","text")

'  {date:FORMAT} is replaced per page when the watermark is added.  The other placeholders are
'  {page}, {pages} and {filename}; {{ gives a literal brace.
success = json.UpdateString("text","jdoe@example.com  {date:yyyy-MM-dd}")
success = json.UpdateString("id","trace")
success = json.UpdateString("zOrder","back")
success = json.UpdateNumber("font.size","14")
success = json.UpdateNumber("opacity","0.15")
success = json.UpdateNumber("rotation","30")

success = json.UpdateBool("tile.enabled",1)
success = json.UpdateNumber("tile.spacingX","60")
success = json.UpdateNumber("tile.spacingY","80")
success = json.UpdateBool("tile.stagger",1)

Dim jsonOut As New ChilkatJsonObject
success = pdf.Watermark("add",json,jsonOut)
If (success = 0) Then
    Debug.Print pdf.LastErrorText
    Exit Sub
End If

Debug.Print "id: " & jsonOut.StringOf("id") & " pages: " & jsonOut.StringOf("pages")

success = pdf.WriteFile("qa_output/report_traced.pdf")
If (success = 0) Then
    Debug.Print pdf.LastErrorText
    Exit Sub
End If

'  Sample output:

'  id: trace pages: 1-3