>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
>

>

IF !EMPTY(cErrorHandler)
ON ERROR &cErrorHandler
ELSE
ON ERROR && <<- If you dont put this then the error handler remains
&& in effect in the calling program!
ENDIF