Where do I place my code

[Guest]

I have three pieces of code. Depending on the value of a specific cell I want
one of these bits of code to run. The code doesn’t assign a value to a cell
but sets another cells validation list.

How can I get this code to run automatically? If it was Access I would
assign the code to the on change event of the field, but I don’t know if this
is possible in Excel…

 

[Duane Hookom]

This is an Access NG, not an Excel NG.