This command converts the string
passed into a string consisting of just lower case letters.
e.g. The value "Hello" would become the
string "hello".
This command is useful for comparing
strings without case.
if "Hello"="hello"
...
end if
The body of this if construct
is not executed because the two 'hello' strings are not equal.
if Lower Case("Hello")=Lower Case("hello")
...
end if
The body of this if construct
is executed because the case is removed from both strings.