Arguments

 

source-string

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

   String that STR$FIND_FIRST_SUBSTRING searches. The source-string
   argument is the address of a descriptor pointing to the string.
 

index

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

   Earliest position within source-string at which STR$FIND_FIRST_
   SUBSTRING found a matching substring; zero if no matching
   substring was found. The index argument is the address of a
   signed longword containing this position.
 

substring-index

   OpenVMS usage:longword_signed
   type:         longword (signed)
   access:       write only