StringToClean = "abcde45-.,;" ValidCharacters = "abcde12345" InvalidCharacters = chrtran(StringToClean, ValidCharacters, "") CleanString = chrtran(StringToClean, InvalidCharacters, "") ? CleanStringThe two lines that do the actual calculation can be combined into one single string:
StringToClean = "abcde45-.,;" ValidCharacters = "abcde12345" CleanString = chrtran(StringToClean, chrtran(StringToClean, ValidCharacters, ""), "") ? CleanStringIf you need it frequently, better make a UDF out of it. Add all the characters you want to keep to the variable ValidCharacters.