SamD

This won't be solved by you asking for pieces of information. We need to understand what you are trying to do - not just one piece of the puzzle, the entire puzzle.

Post your document containing the code you already have. Also post a sample PDF file that you would pick. Explain what the user should see, click and have happen.

Your original question was to see a screen preview of a PDF. This is not practical because the suggested solutions vary with versions of Windows, MS Word, Adobe Acrobat, Web Browsers and configurations. The suggested alternative of using the preview in FilePicker avoids some of these configuration issues but not all.

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Andrew Lockton
Chrysalis Design, Melbourne Australia