Date?

Two text boxes....formated for short date
Start_of_warranty
end_of_warranty
How do I make end_of_warranty = start_of_warranty PLUS 3 months....
?
its the 3 months thats getting me!!
Help!!
Bazz

Code:

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end_of_warranty = DateAdd("m", 3, Start_of_warranty)

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Thanx dude