Do you want to annoy people, or merely alert them to a condition being met?
Use conditional formatting to highlight the cell.

- Jon
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Jon Peltier, Microsoft Excel MVP
Tutorials and Custom Solutions
Peltier Technical Services, Inc. - http://PeltierTech.com
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"amirstal" wrote in message
...
Can anyone help with this:

How can I make a cell to flash a text, let's say "Warning!" whenever a
condition is met. For example, if cell A1 = cell A2, make cell A3
flash the text "Warning!".

Thanks,

Amir