Arguments

 

source-string

   OpenVMS usage:char_string
   type:         character string
   access:       read only
   mechanism:    by descriptor

   Source string within which STR$POSITION searches for the
   substring. The source-string argument is the address of a
   descriptor pointing to the source string.
 

substring

   OpenVMS usage:char_string
   type:         character string
   access:       read only
   mechanism:    by descriptor

   Substring for which STR$POSITION searches. The substring argument
   is the address of a descriptor pointing to the substring.
 

start-position

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       read only
   mechanism:    by reference

   Relative position in the source string at which STR$POSITION
   begins the search. The start-position argument is the address of
   a signed longword containing the starting position. Although this
   is an optional argument, it is required if you are using the JSB
   entry point.

   If start-position is not supplied, STR$POSITION starts the search
   at the first character position of source-string.