Capture PrintDialog Events

Is there a way to capture the events fired in a PrintDialog? I
would like to capture when the user presses "Print" so I can do some
cleanup.

The asp.net (IE6) application I'm working on has 6 pages, each of
which has a link to a "print view" page. That "print view" page has a
"print" button which calls a javascript function "printThis":

function printThis() {
alert('printThis')
window.print();
/*window.onafterprint fires when page
is loaded into print dialog, not
when page is actually printed;
need to capture when user actually hits
the 'print' button on the printDialog
and call donePrinting
*/
}

function donePrinting() {
alert('donePrinting')
document.all.hdnFldPrinted.value = true;
document.forms[0].submit();
/*code for clean-up and redirection
to one of 6 pages is in code-behind */
}

Does anyone know how I can capture when the user presses the "print"
button in the PrintDialog that's opened by window.print()?