STRPOS
The STRPOS function returns the starting position of the first occurrence of one string (called the search-string) within another string (called the source-string). If the search-string is not found and neither argument is null, the result is zero. If the search-string is found, the result is a number from 1 to the actual length of the source-string.
The STRPOS function is identical to the POSSTR function. For more information, see POSSTR.