Perhaps you might want to check out
Debra's nice coverage on the subject at her:
http://www.contextures.com/xladvfilter01.html
http://www.contextures.com/xladvfilter02.html

Signature
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Rgds
Max
xl 97
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GMT+8, 1° 22' N 103° 45' E
xdemechanik <at>yahoo<dot>com
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> hi
> I have many problem about advance filter,
> sometime answering . sometime not ??
> I wonder why ?
> please help me .
> best