! *** PREDECLARED TYPES
     
      %IF %DECLARED ( %BASIC$QUADWORD_DECLARED ) = 0 %THEN
         RECORD BASIC$QUADWORD
            LONG FILL ( 2 )
         END RECORD
         %LET %BASIC$QUADWORD_DECLARED = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$OCTAWORD_DECLARED ) = 0 %THEN
         RECORD BASIC$OCTAWORD
            LONG FILL ( 4 )
         END RECORD
         %LET %BASIC$OCTAWORD_DECLARED = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$HFLOAT_AXP_DECLARED ) = 0 %THEN
         RECORD BASIC$HFLOAT_AXP
            LONG FILL ( 4 )
         END RECORD
         %LET %BASIC$HFLOAT_AXP_DECLARED = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$F_FLOATING_COMPLEX_DECL ) = 0 %THEN
         RECORD BASIC$F_FLOATING_COMPLEX
            SINGLE REAL_PART
            SINGLE IMAGINARY_PART
         END RECORD
         %LET %BASIC$F_FLOATING_COMPLEX_DECL = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$D_FLOATING_COMPLEX_DECL ) = 0 %THEN
         RECORD BASIC$D_FLOATING_COMPLEX
            DOUBLE REAL_PART
            DOUBLE IMAGINARY_PART
         END RECORD
         %LET %BASIC$D_FLOATING_COMPLEX_DECL = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$G_FLOATING_COMPLEX_DECL ) = 0 %THEN
         RECORD BASIC$G_FLOATING_COMPLEX
            GFLOAT REAL_PART
            GFLOAT IMAGINARY_PART
         END RECORD
         %LET %BASIC$G_FLOATING_COMPLEX_DECL = 1
      %END %IF
     
      %IF %DECLARED ( %BASIC$H_FLOAT_AXP_CMPLX_DCL ) = 0 %THEN
         RECORD BASIC$H_FLOATING_COMPLEX_AXP
            BASIC$HFLOAT_AXP REAL_PART
            BASIC$HFLOAT_AXP IMAGINARY_PART
         END RECORD
         %LET %BASIC$H_FLOAT_AXP_CMPLX_DCL = 1
      %END %IF
    
    
    ! 
    !         ARG$ - The argument descriptors
    ! 
      DECLARE LONG CONSTANT ARG$C_UNKNOWN = 0  !  Unspecified or unknown 
      DECLARE LONG CONSTANT ARG$C_VALUE = 1  !  Passed by value 
      DECLARE LONG CONSTANT ARG$C_REF = 2   !  Passed by reference 
      DECLARE LONG CONSTANT ARG$C_DESC = 3  !  Passed by descriptor 
      DECLARE LONG CONSTANT ARG$K_SIZE = 2
      DECLARE LONG CONSTANT ARG$C_SIZE = 2
      DECLARE LONG CONSTANT ARG$S_ARGDEF = 2
      record ARGDEF
         group ARG$R_VALCTL_OVERLAY
            variant
               case
                  BYTE ARG$B_VALCTL         ! Validation control byte 
               case
                  group ARG$R_VALCTL_BITS
                      ! Passing mechanism 
                     BYTE PASSMECH_bits   ! COMMENT ADDED BY SDL - PASSMECH_bits contains bits PASSMECH through FILL_18_
                  end group ARG$R_VALCTL_BITS
    !  Passing mechanisms 
            end variant
         end group ARG$R_VALCTL_OVERLAY
         BYTE ARG$B_BYTECNT                 ! Remaining byte count 
      end record ARGDEF