Date compare function on Access Form

I have an MS Access Form with one bound field, ExpirationDate and one unbound field ExpirationBlendDate.  

The ExpirationDate default value is calculated (=DateAdd("yyyy",5,[CreationDate])

The ExpirationBlendDate is populated from a combo box using an After Update event (ExpirationBlendDate = Combo20.Column(3))

I'd like to compare the ExpirationDate to ExpirationBlendDate, and write the older date to the ExpirationDate field.  I tried adding the following line into the same After Update event, but it's not working...

ExpirationDate = IIf([ExpirationBlendDate] < [ExpirationDate], [ExpirationBlendDate],  [ExpirationDate])

Can you let me know how I might fix?  

Thanks in advance for the assist.
Ken MilamEngineerAsked:
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Gustav BrockCIOCommented:
You are probably comparing text and date. So try:

ExpirationBlendDate = DateValue(Combo20.Column(3)))

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And ExpirationBlendDate must, of course, be dimmed as Date.

Pawan KumarDatabase ExpertCommented:
Use dateValue.

[ExpirationDate] = IIf(DATEVALUE([ExpirationBlendDate]) < DATEVALUE([ExpirationDate]), [ExpirationBlendDate],  [ExpirationDate])

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Ken MilamEngineerAuthor Commented:
Pawan KumarDatabase ExpertCommented:
welcome.  Glad to help as always :)
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