Here's my google.
https://www.google.com/search?hl=en&as_q=use+tesseract+from+net+code+example
Step 2. I would tailor that to my need.
Hope this helps,
Bob
The discussion thread here asks how to convert a PDF to an image.
http://forums.cnet.com/7723-6122_102-349890/how-to-convert-a-pdf-document-into-image-format/?refresh=1386342718018
But I want to ask a slightly different question. How do you do the same thing but automatically using code? In other words, how do you write a program in .NET to do this?