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__PARCSIZ          Return allocated size of a character string


Syntax Usage:  . To obtain size of memory allocated for a string
                 parameter:

                   mov   ax,<ORDER>
                   push  ax
                   call  __PARCSIZ
                   add   sp, 2

               . To obtain size of memory allocated for a string element
                 from an array parameter:

                   mov   ax, <ORDER>
                   mov   bx, <INDEX>
                   push  bx
                   push  ax
                   call  __PARCSIZ
                   add   sp, 4

Arguments:     <ORDER> is the placement order in the parameter list.
               <INDEX> is the index of the array element to be accessed.

Description:   __PARCSIZ returns the number of bytes in memory allocated
               for the specified string, including the null terminator,
               in AX.  Note that __PARCSIZ returns zero for constants,
               e.g., DO <process> WITH "ABC".  The parameter must be
               passed by reference with the "@" symbol.