Hi, We am trying to use a buffer as an input stream. For that we have used "basic_array_source" like this boost::iostreams::basic_array_source<BYTE> source(mem_ptr,size); boost::iostreams::stream streamReader; streamReader.open(source, std::ios::binary); But this method does not give input-stream related methods (functions like seekg), instead it give methods related to output stream (seekp). Can you please tell what is wrong with this approach? Thanks, Lloyd