expert advice on publishing software needed

High folks,

I need some advice on how to keep a bit of software free. I am a
sociologist and have co-authored a methods book (on qualitative content
analysis). As most of these methods, it is computer-supported. Since
commercial software in this sector is expensive (and not suitable for our
purposes anyway) I have written some Macros in VisualBasic, which are
included in Word files and templates. Its all ugly programming, ugly
software etc. (a sociologist! writing in VBA! argh!), but it seems to do
the trick. My questions are:

1) Am I allowed to put the files with the macros on the book publisher's
website for free download, or can Microsoft object?

2) Do I need to / can I put some Copyleft (or whatever) on it to keep it
free, or can it stay there 'forever free' without a license?

Thanks

Jochen

Dr. Jochen Gläser

Research Evaluation and Policy Project

Research School of Social Sciences

The Australian National University

Canberra ACT 0200

Ph-+61 02 6125 2238 / Fax- +61 2 6125 9767

http://repp.anu.edu.au/jochen.htm