Is the original error handler set using ON ERROR? If so, you can use Josh's suggestion in the following manner:

PROCEDURE MyFunction
LOCAL cErrorHandler
cErrorHandler=ON("ERROR")
ON ERROR DO newhandler   && Change
.
.
IF !EMPTY(cErrorHandler)
   ON ERROR &cErrorHandler
ENDIF
RETURN  && Back to calling program

You might want to look at using the Error event instead of ON ERROR.

>I need to temporarily set to error handler in a function. I would like to set the handler back to whatever it was in the calling function, but I can't find a way to get VFP5.0 to tell me what the original handler was. I'm sure it's simple, but I can't figure it out.
>