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Harlan Grove
 
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Default Improving Excel Performance - London Excel User Conference - July 19-21

Harlan Grove wrote...
....
=COUNTA(UNIQUEVALUES(Rng))

where UNIQUEVALUES is from Longre's MOREFUNC.xll add-in in order to
consider XLL add-in functions as well.


That'll teach me to work from memory. Make that MOREFUNC.XLL's
COUNTDIFF function.