These are two totally different topics. Encryption makes files unreadable to any but those you want them to. Encapsulation is normally discussed in terms of Object Oriented Programing (OOP) - something more applicable to Visual FoxPro (VFP) than FPD.
You'll need to provide more information on what you are trying to do. (Note: You are aware that asking questions for "homework" assignments is not acceptable in Tek-Tips - correct?)
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