Crystal Reports Session cleanup question

Message

     Hi,

We're using Crystal reports in Java (deployed as a Servlet under Tomcat 6).
We're facing a problem with "ReportClientDocument" cleanup.

Say we have:
ReportClientDocument clientDoc = new ReportClientDocument();
clientDoc.open(reportName, options);

We discovered that we must call clientDoc.close() at *some* point, otherwise our application runs out of memory. On the other hand we can't close it too soon, because this break the pagination support.

Currently we store in on the Http Session, and use a SessionListener to call clientDoc.close() when session terminates.

This works fine, but I wanted to please ask: can we ask Crystal to recognize when the user closes the report window (pression "X" or "Alt-F4"), and close the client document then?

Thansk