How to LOG Download Info in <A> TAG

Hello friends,

Currently I have one asp page which opens after the proper ID entered by
user and it generate tag with application software download link. When
the user click on the link (which is pointed to the actual physical file
..EXE of Size around 10 - 20 MB) it downloads file. But how do i change the
logic so that the activity will get LOG in some text file. Like which user
has downloaded which file. (it should log into text file).

I think I need to remove the for direct download instead it shoudl call
an asp page whcih should log the event and push the file to user. Please
suggest with sample code if possible.

Regards
Prabhat