ŒCLASSES References to user-defined and external classes

The niladic system function ŒCLASSES returns a vector of references to all the user-defined classes in the workspace, plus any references to external classes which have been retained in the workspace (typically by a call to the system function ŒGETCLASS or the system method ŒCLASSREF)

In this example, we have three user-defined classes in the workspace, and we also create a reference to the .Net DateTime class:

       )CLASSES
LiteraryWork    Poem    Sonnet     
      DT„'.net' ŒNEW 'System.DateTime' 2007 5 30
      CLASSDT„DT.ŒCLASSREF
      CLASSDT
{.net:DateTime}
     ŒCLASSES
{LiteraryWork} {Poem} {Sonnet} {.net:DateTime}