Using external functions in a VA Smalltalk application One of the benefits of VA Smalltalk is that you can use programs created in languages other than Smalltalk in a VA Smalltalk application. You can use programs written in languages such as C or COBOL. Also, you can use OLE (Object Linking and Embedding) server applications and custom control services (OCXs) in your VA Smalltalk application and even modify them in the Composition Editor. • Accessing external functions • Dynamic Data Exchange • Threads • Using OLE Support