The second sheet of the Form Wizard dialog enables you to select the target class; that is, the class whose instances are updated by using this form.
To select the target class for your form
Select the target class from the Class combo box. The classes displayed alphabetically in the list box portion of the Class combo box represent all the classes defined in your schema.
Alternatively, you can specify the name of the target class in the text box portion of the Class combo box.
Click the Next > button to affect your selection and display the next sheet.
The target class that you select for your form is the class from which you select features to be displayed on your form for all instances or for instances of a specified collection.