Final answer:
The items checked to ensure that the user has entered values into the Add dialog box are empty fields and valid data type.
Step-by-step explanation:
The two items that are checked to ensure that the user has entered values into the Add dialog box are empty fields and valid data type. If any of the fields are left empty, the user will be prompted to fill them in. Additionally, each field has a specific data type requirement, such as text, number, or date, and the user's input is validated against these requirements.