<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>On May 23, 2014, at 8:26 PM, silvioprog <<a href="mailto:silvioprog@gmail.com">silvioprog@gmail.com</a>> wrote:</div><div><br></div><blockquote type="cite"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">2014-05-23 15:50 GMT-03:00 Craig Peterson <span dir="ltr"><<a href="mailto:craig@scootersoftware.com" target="_blank">craig@scootersoftware.com</a>></span></div><div>I have a question. Adding this extended header, can I open/uncompress the zip file normally in programs like 7z and WinRAR?</div></div></div></blockquote><br><div>Yes. The appnote describes the format for the "extra field", which is extensible so multiple records can be stored and applications can skip over any they don't understand. 7-zip doesn't use it, but doesn't have a problem with it. I'm not sure about WinRAR, but WinZip will use the header if it exists. I didn't invent it for Abbrevia; it was originally designed by the Info-zip guys. </div><div><br></div><div>-- </div><div>Craig Peterson</div><div>Scooter Software</div></body></html>