WinRAR is good at searching for a string in text files(java, xml, txt etc.) within an archive and it supports multiple archive formats. (rar, 7zip, winzip etc)
Is there some way to extend this feature (by means of plug-ins etc) to search within Pdf & office files (doc, ppt), Or any other similar unzip tool which has this feature?
(Extracting the entire archive & searching using Windows search is always one option)