Open the form that has the field or other component that displays the data to
which you want to refer.
For example, to create a subject line that includes a customer ID number and
name, open the Customers form.
Go into Design Mode for that form.
Select the desired component, for example, the Customer ID field.
Verify that the Component properties
sheet is displayed.
If not, select the View → Component Properties option.
On the Component properties sheet,
locate the Data Source → Binding field.
The component’s internal name is displayed in that field after the period. For
example, for the customer ID number, the Binding field displays object.CustNum.
Thus, the Customer ID field name is
CustNum.