Actually you don't need VBA for this. You can manage it with a conditional
field
{ IF{ =OR(OR({ euro_total } > 0, { swan_total } > 0),{ genus_total }> 0) } =
1 "A" "B"}
Watch the spacing - and insert field boundaries with CTRL+F9.
In place of A & B insert a checked box character and an unchecked box
character (wingdings 2 font) or vice versa depending on when you want the
box checked. Check the calculate on exit property for each of the three
checked fields.
See also "Testing for a value in one of several fields" at
http://www.gmayor.com/formatting_word_fields.htm

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> I am tring to create a form that will check or uncheck a box next to a
> signature line to indicate if the signature is required or not.
[quoted text clipped - 9 lines]
> Right now I am assuming I need to use VBA for this hence my previous
> post.