You should look at something called VBA (Visual Basic for Applications)
which is the preferede macro language for the Microsoft Office suite. Since
you are posting in a Excel newsgroup, I assume that this is the VBA-lingo
you are most interested in.

I find that the help files in Excel is quite good, however I can also
recomend http://www.ozgrid.com/VBA/ . Perhaps not entry level content, but
it depends on your experience with other (macro) languages.

Let us know that you need to do, and perhaps we can direct you to a better
source of information.

/Dann