>Hi Rick,
>
>didn't 7z has an API?
>
>I stuck with dynazip (and somehow it becomes unreliable) so I had a look around. Juts the presure is not high enough ...

For all the zipping I need I still use pkzip25.exe, original (and the last freebie) from Phil Katz. It's a bit dated, from 1998, but it still works perfectly. I shell out using late Ed Rauh's api_apprun, keep it hidden, and mostly generate .bat files, redirect the output into a .log file, redirect the error output into another, then check the latter log (if it was created at all). If I need it as a string to store in a blob field, I use filetostr().

It's blazingly fast, nobody notices that there's any zipping going on.