The Substitute() function replaces a string argument with substituted text, but does not change the original string. The Substitute Into() function changes the original string with a replacement expression.
str1 = str2 = "All things considered";
str3 = Substitute( str1, "All", "Some" );
str4 = Substitute Into( str2, "All", "Some" );
Show( str1, str2, str3, str4 );
str1 = "All things considered";
str2 = "Some things considered";
str3 = "Some things considered";
str4 = .;