Is there a way to create an audible notification when you get a bug in the development environment?

I have a routine that runs for quite a while (20 minutes or so). While it is running, I move on to other things. If/when a bug occurs, I'd like to hear some audible notification, so that I don't have to keep checking all the time.

I haven't gotten anything to work with ON ERROR (I thought I could call MESSAGEBOX), as I can't get the program to halt on the error line.

Any suggestions, or am I barking up the wrong tree?

Thanks,

Jim