how to search and highlight pdf's keyword programmatically

i've trie开发者_Python百科d two different component to integrate pdf file in windows form application (c#). the above mentionated component are PDFSharp and Sloppycode webBrowserEx. Now, both of them work fine, but I'm not able to search and highlight programmatically full text defining by user through a textBox.

Can anyone give me some suggest to achieve my purpose?

Thanks in advance.

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I found this answer to help me when I was working with PDFs. Not sure if you seen it yet but it may help you. I went with iTextSharp.

how to highlight a text or word in a pdf file using iTextsharp?

hope it helps.