You can run an external program with the Shell function.
However if you want to zip something without opening a
window you need a program which can be run from the
command line.
If you have a registered copy of Winzip you can download a
command line add on. There used to be other zip programs
which you can use from a command line.
There are also free Zipper OCXs on the Web. Some of them are quite
worthwhile. Get One, register it (References!), then follow the
documentation.
Sorry. Its been a few years since I used them, so can't help you out
with sites.
Regards Greg Kraushaar
Wentworth Falls Australia
(Do not email - the reply address is a Spam spoofer)
(If you really must, remove all UCase and numbers)