try this code...loop through the string character by character...check for a vowel and build a new string if its not.
stringvar str_with_vowels:= {DATABASE.FIELD};
stringvar str_without_vowels;
stringvar currentchar;
numbervar i:=1;
str_without_vowels:= "";
currentchar:= "";
for i:= 1 to len(str_with_vowels) do
(
currentchar:= str_with_vowels;
select currentchar
case "a","e","i","o","u","A","E","I","O","U":
""
default:
str_without_vowels:= str_without_vowels + currentchar;
);
str_without_vowels;