Empty field contents in calculation

[aalrr1]

How do I delete a field's contents in a calculation? I have tried setting the field to "" and using LeftWords(Fieldname,0). Neither of these attempts wiped out the field. I tried " " but that holds a space. I want the field to be empty.

Thank you.

[Raybaudi]

Really you don't want the field to be empty...

You want that the field makes its calculation and, in some CASE, remains empty.

So go with a Case ( ) function, leaving empty the default result, like:

Case(

Get ( CurrentTime ) > 12*60*60 ; "PM"

)