Events Handling with DownLoad Dialog from Web Form

Hi. Thanks for the help with getting the Download Dialog to
work so a client can select a file to download from a web page
(see my post 09-24-2004). Now that I can get the Download
Dialog to work properally, how does my application (server
side) know which button the user (browser side) has selected.

If user selects CANCEL I do not want my application to do
anything, so that's simple enough. If user selects
OPEN or SAVE, I want my application to respond to each
differently. Specifically, I am using IIS virtual SMTP to
send an e-mail notification when a file is downloaded.
Since this functionality is is the "Download" button of
my app, the notification goes as soon as the dialog
is instantiated. So how do I set up an event handler
for the Download Dialog???


Thanks for any help.


jayare