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Editorial Team
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Asked: 2026-06-17T22:17:13+00:00

I have an access database, with a form, that contains numerous textboxes. The textboxes

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I have an access database, with a form, that contains numerous textboxes. The textboxes are filled with currency data based on a selection made by the user. Each record may have different values some may have no values. I need to add 3 of the txtboxes together but the value always shows as Null. 

me.txt1 = Nz(me.txt2.value + me.txt3.value + me.txt3.value)
txt2 = 23.04
txt3 = Null(empty)
txt4 = 15.64

The value of txt1 should be 38.68 instead its coming out Null. The textboxes are populated by a subroutine that is called from the AfterUpdate event of a dropdown.

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1 Answer

  1. Editorial Team

    Where do you use that formula ? Is it in VBA ? You don’t need it.
    If it’s from the Control Source of txt1, then Meshould be replaced by Form (or by nothing at all)

    In the Control Source property of txt1, type = nz(txt2)+nz(txt3)+nz(txt4)
    That should be all you need. No VBA.
    Another solution, IF the source of the form is a Query, is to add a calculated field in the query.
    In both cases, of course you will NOT store that data (which would violate 3rd Normal form)

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