Question

I would like to write a macro that will run every time a record is entered into a certain table. What I want the macro to do is check to see if there is a related record in a different table, and if so, to change a field of data type Yes/No to Yes. If no related record is defined yet, I would do nothing, as the default for the Yes/No field is No.

The two tables are related in this way.

So when a record is entered in to the tblOrders table, I need to check if a related record exists in the tblRecipes table, and I would like to use a macro to do so if possible, as I will be repeating this action for every Order entered.

Is this possible, and if so, what would the macro language be please?

Answer 1

The usual thing would be to use forms for data entry and to check the Recipes table in the before update event for the control, for example.

Private Sub CustomerPartNumber_BeforeUpdate(Cancel As Integer)
    If Not IsNull(DLookup( _
     "CustPartNum", "tblRecipes", "CustPartNum=" & Me.CustomerPartNumber)) Then
        Me.AYesNoField = True
    Else
        Me.AYesNoField = False
    End If
End Sub

However, in Access 2010, you can use data macros. This example will run whenever CustomerPartNumber is changed in Orders.