replacex ( haystack_string_expression , regular_expression , string_expression )

returns string_expression

Return a new string where all occurrences of substrings matching the regular expression regular_expression are replaced by string_expression in the string haystack_string_expression.

a$ = "Ouvi bossa e saí da fossa"
print Replacex(a$,"bossa","sopa")
print Replacex(a$, "[bf]ossa", "sopa")

will display

Ouvi sopa e saí da fossa
Ouvi sopa e saí da sopa

By default the nature of regular expressions is “greedy”. This behaviour can be changed using the RegexMinimal statement.