' For complete examples and data files, please go to https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-.NET
Using doc As SlidesDocument = Document.Load(Of SlidesDocument)(Utilities.MapSourceFilePath(FilePath))
For Each slide As SlidesSlide In doc.Slides
If slide.BackgroundImage IsNot Nothing Then
Console.WriteLine(slide.BackgroundImage.Width)
Console.WriteLine(slide.BackgroundImage.Height)
Console.WriteLine(slide.BackgroundImage.GetBytes().Length)
End If
Next
End Using