is it possible for an html/asp page to access Excel directly
 

we have web users that have requested the web application access an existing
excel spreadsheet directly.

Users have an excle spreadsheet with complex functions, macros, formatting
etc. They have data in the database that is accessed via a web applciation.
They would like to use the web app to get the data they want on screen and
then click a button to get that data and put it into specifc cells in the
spreadsheet. is this possible?