CALL_USER

     Calls a program written in another language from within TPU.
     CALL_USER parameters are passed to the external program exactly as you
     enter them; TPU does not process them in any way.

  Syntax

     string2 := CALL_USER (integer, string1)

  Parameters

     integer    The integer passed to the external program by reference.

     string1    The string passed to the external program by descriptor.

  Note:  For an example of how to use CALL_USER with a BASIC program, see
         the VSI Text Processing Utility Manual.