The Date/Time field can contain only a date, or a Null (blank).
"Missed Visit" is text, so that cannot go into a Date/Time field.
You can display the message on a report, by using this Control Source:
=IIf([Date1] Is Null, "Missed Visit", Format([Date1], "Short Date")
replacing Date1 with the name of your field, and making sure the Name of
this text box is not the same as a field name.
You could do that in a form as well, but you could not type into the box. If
that's important, you could place it on top of the real text box (Format |
Bring to Front), and use its Enter event to SetFocus to the real box (which
has its TabStop property set to No.)
Or, you might just use conditional formatting to highlight the blanks with a
different color:
Expression ... [Date1] Is Null

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Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.
> I have a form that currently displays the date of a visit.
>
[quoted text clipped - 12 lines]
>
> Deborah
Deborah Najm - 05 Dec 2005 17:19 GMT
Is it possible to use one control to enter values into two different fields?
If the user enters the text - "Missed Visit" update the field "Visit_Status"
to "Missed Visit", if the value is a date, update the field "Visit_Date" to
the Date value.
Then, to display use: =IIf([Visit_Date] is Null and [Visit_Status] = 'Missed
Visit', "Missed Visit", Format([Visit_Date], "Short Date")
Deborah
> The Date/Time field can contain only a date, or a Null (blank).
> "Missed Visit" is text, so that cannot go into a Date/Time field.
[quoted text clipped - 29 lines]
>>
>> Deborah
Allen Browne - 06 Dec 2005 01:26 GMT
If you want to use that kind of interface, you will have to use an unbound
control. In its AfterUpdate event procedure, examine if it IsDate(), and
write it to the appropriate field.
Personally I would not do it that way.

Signature
Allen Browne - Microsoft MVP. Perth, Western Australia.
Tips for Access users - http://allenbrowne.com/tips.html
Reply to group, rather than allenbrowne at mvps dot org.
> Is it possible to use one control to enter values into two different
> fields?
[quoted text clipped - 39 lines]
>>> the Visit Status and displayed either one, and a function that would
>>> properly update the fields, but I am hopeless and a novice - any advice?