' For complete examples and data files, please go to https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-.NET
Document.DefaultSearchableObjects = New SearchableObjects() With { _
.WordsSearchableObjects = WordsSearchableObjects.Hyperlinks Or WordsSearchableObjects.Text, _
.CellsSearchableObjects = CellsSearchableObjects.HeadersFooters, _
.SlidesSearchableObjects = SlidesSearchableObjects.SlidesBackgrounds Or SlidesSearchableObjects.Shapes, _
.DiagramSearchableObjects = DiagramSearchableObjects.None, _
.PdfSearchableObjects = PdfSearchableObjects.All _
}
For Each file As Object In Directory.GetFiles("D:\files")
Using doc = Document.Load(file)
' The code for working with found watermarks goes here.
Dim watermarks = doc.FindWatermarks()
End Using