hi
a add in is a special xl file usually with a .xla file extention that will
load in the background when xl starts. it usually contains extra code or
funcitons that provides xl with extra functionality. it's usually done so
that the user will have special macros or formulas available to use with all
other xl files.
how to make one. save a file as a .xla or .xll(i think). but if it doesn't
have special code in it, you'll have a non-functioning add in.
xl comes with some add ins most notably the analysis tool pack amongs
others. on the 03 menu bartoolsadd ins. this will display a list of add ins
that might be available to you. there are many 3rd party addins on the net
that do a varity of things. it's also a good way to distribute your own
special functions.

do you have anything special in mind?

Regards
FSt1
"PBG" wrote:

What is an "add-in"? How does it work and how to make one?

Thanks
(the newbie is back)