ESTABLISH

 The ESTABLISH  procedure  specifies  a  condition  handler  that
 executes if your program generates operating-system events.


 Syntax:

    ESTABLISH( function-identifier )


 The 'function-identifier'  parameter  must  be  the  name  of  a
 function  that  has  the  ASYNCHRONOUS  attribute.  The function
 passed to ESTABLISH must have two formal array parameters.