I don't think so. Why would you want to know?

--
HTH

Bob Phillips

(remove nothere from email address if mailing direct)

"Koye Li" wrote in message
...
Let say we have defined an UDF fuction foo(a,b) that takes 2 cell
references
as its arguments :

public function foo(byval a, byval b)

and on the worksheet, we have

=foo(B1,C1)

Whenever B1 or C1 changes, foo() gets triggered and is called by Excel.
Is
there anyway within foo() to tell which argument originated the call?