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

Question

I need to search a word in a existing pdf file and i want to highlight the text or word

and save the pdf file

I have an idea using PdfAnnotation.CreateMarku

Answer 1

I convert Jcis's VB project to WpfApplication C#(file in google drive) , and even apply Boris's bugfixes , but the project doesn`t run. It is very appreciated if someone who understands the algorithm of the program, fix it.