Control mouse clicks

[Selvan tiru]

Have a JDBC application: while the query is geeting the
results set, I want to diaable the mouse clicks or
lock the screen, use modal dialog. But once the result set
is back the modal dialog should disappear. Is there
a way to dismiss the JOPTIONPANE.XXXX even if the
user did not select any choice.
OR how to disable the mouse clicks while the result set is
being fetched, and enable mouse clicks after that
programmatically
thanks
Selvan