Release 10.1A: OpenEdge Getting Started:
Object-oriented Programming

> ## Verifying the type and validity of an object reference

> Given an object reference, before you use it, you can:

> - Test it to ensure that it references an object instance using the `VALID-OBJECT` built-in function.

> - Validate the type of the object represented by the object reference using the `TYPE-OF` built-in function.

Copyright © 2005 Progress Software Corporation www.progress.com Voice: (781) 280-4000 Fax: (781) 280-4095