How can I implement a horizontal thumbnail preview pane?

Q: I would like to implement a thumbnail preview pane similar to the
existing PDFView sample project, but instead of being vertical I need
the images to display horizontally. I would like to be able to select
the page from the thumbnails. I would also like to select multiple
pages from the thumbnails.
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A: PDFNet does not provide a special control that displays thumbnails
horizontally, however you can use pdftron.PDF.PDFDraw.GetBitmap (see
http://www.pdftron.com/net/samplecode.html#PDFDraw) to generate page
thumbnails that can be directly added to a scrollable thumbnail
control of your choice.

Regarding the .NET specific part related to a scrollable control that
contains image thumbnails, you may want to take a look at:
www.codeproject.com/KB/cs/thumbnaildotnet2.aspx,
www.codeproject.com/KB/dotnet/multiImageViewer.aspx etc.