Re-throwing an exception without loosing the stack trace

[Clark C . Evans]

How do I catch and then re-throw an exception without
loosing the information about the stack trace?  I've
looked around alot and don't see the "obvious" answer.

Thanks!

Clark

P.S. I need to catch exceptions to clean up some
     resources (database locked table), but
     then I want to re-throw the error... in
     it's original stack trace so that I can
     find it... loosing the stack trace makes
     for brutal debugging.