BoundObjectFrame.Locked Property (Access)
The Locked property specifies whether you can edit data in a control in Form view. Read/write Boolean.
The default setting of the Locked property is False. The BoundObjectFrame control functions normally but doesn't allow editing, adding, or deleting data.
Use the Locked property to protect data in a field by making it read-only. For example, you might want a control to only display information without allowing editing, or you might want to lock a control until a specific condition is met.
The following example toggles the Enabled property of a command button and the Enabled and Locked properties of a control, depending on the type of employee displayed in the current record. If the employee is a manager, then the SalaryDetails button is enabled and the PersonalInfo control is unlocked and enabled.