Recentlt, I need to insert comment in my pf document, but I never try it and finds little information from the intenet, but I found that the PDF has the function of showing the comment and hiding the comemnt, so I try to convert a word document that contains comment in it and after I convert it to PDF, I found taht my comment is missing adn when I try to show it, the document says taht there is no comment in the pdf document, what is the problem? where is my comment? Can anybody help me please, my OS is Windows XP and I use a pdf creation component Spire.PDF.