I need to edit formulas in about 10,000 cells. The formulas are all
basically the same: they differ only in that two cell references in
each formula are unique to that cell. The basic format of each formula
is '=Function1(CellRef1,CellRef2,"")', where Function1 is a User
Defined Function. Also, the edits I need to make are simplistic: I
need to change each 'Function1' to 'Function2', where Function2 is
also a User Defined Function.

Is there a way to use XCL 2003 or XCL 2010 Code to do my edits?
TIA,
JingleRock