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Search for text in a PDF in C++

To search for text in a PDF using regular expression.

PDFDoc doc(filename);
TextSearch txt_search;
TextSearch::Mode mode = TextSearch::e_whole_word | TextSearch::e_page_stop;
UString pattern("");

//use regular expression to find credit card number
mode |= TextSearch::e_reg_expression | TextSearch::e_highlight;
txt_search.SetMode(mode);
pattern = "\\d{4}-\\d{4}-\\d{4}-\\d{4}"; //or "(\\d{4}-){3}\\d{4}"
txt_search.SetPattern(pattern);

//call Begin() method to initialize the text search.
txt_search.Begin( doc, pattern, mode );
SearchResult result = txt_search.Run();

Search PDF files for text
Full code sample which shows how to use TextSearch to search text on PDF pages using regular expressions.

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