How to Disable FORM DESIGN or DISABLE CODE on MS ACCESS

Saving your database as an MDE file prevents the following actions:

Viewing, modifying, or creating forms, reports, or modules in Design view.
Adding, deleting, or changing references to object libraries or databases.
Changing code using the properties or methods of the Microsoft Access or VBA Object models ? an MDE file contains no source code.
Changing your database's VBA project name using the Options dialog box.
Importing or exporting forms, reports, or modules. However, tables, queries, and macros can be imported from or exported to non-MDE databases. Any tables, queries, or macros in an MDE database can be imported into another database, but no forms, reports, or modules can be imported into another database.