Most of the time when you are wanting to enter information automatically in fields as a result of a user interaction it is easiest to use some kind of event trigger from the form. Regularly you want to close down a form and alter a field value in a table on a form which is not presently open.
While the events associated with individual fields and the code therein on forms is generally very good at executing code consecutively making it very predictable, it doesn’t always like you calling another field on another form from a different form often producing an error.
In such cases it is better to alter data entry completely programmatically rather than relying on forms to be loaded before altering fields. The code can still be triggered by an event on a form however.
This code looks to a table of Attendees (T008Attendees) on Courses and selects an individual booking based on its reference booking (I have set this to ParameterID).
The letter sent and letter sent date fields are then updated. As many fields as you want could however be updated. Makes for a very nice user experience.
Dim db As DAO.Database
Dim rst As DAO.Recordset
Dim strSQL As String
Set db = CurrentDb()
strSQL = "SELECT T008Attendees.PKID, T008Attendees.LetterSentDate, T008Attendees.LetterSent FROM T008Attendees WHERE (((T008Attendees.PKID)=" & ParameterID & "));"
Set rst = db.OpenRecordset(strSQL, dbOpenDynaset)
With rst
If .RecordCount > 0 Then
.MoveFirst
.Edit
!LetterSent = 1
!LetterSentDate = Date
.Update
End If
End With