LIB$MATCHC

   The Match Characters, Return Relative Position routine searches a
   source string for a specified substring and returns an index,
   which is the relative position of the first occurrence of a
   substring in the source string. The relative character positions
   returned by LIB$MATCHC are numbered 1, 2, . . . , n. Thus, zero
   means that the substring was not found.

   Format

     LIB$MATCHC  sub-string ,source-string
 

Additional information available:

Returns         Arguments