我发现此链接在c＃中引入转换代码，但很容易在vb.net中重写它。

http://www.verypdf.com/app/pdf-to-text-ocr-converter/sdk-for-net.html [ ^ ]

但是在***中询问你的问题一样，请重新给出答案，我认为它们会很好。点击此链接：

http：// ***.com/questions/1491226/convert-pdf-to-text-file-using-vb-net [ ^ ]

玩得开心

i find this link that introduce convert code in c#, but it is easy to rewrite it in vb.net.
http://www.verypdf.com/app/pdf-to-text-ocr-converter/sdk-for-net.html[^]
but same as your question is asked in ***, please resd the answers, i think they will be good. follow this link:
http://***.com/questions/1491226/convert-pdf-to-text-file-using-vb-net[^]
have a good time