UCase
Use the UCase function to return a string, converted to
      uppercase.
    syntax
The UCase function returns a variant (string).
UCase(string)
The required string argument is any valid string expression. If string contains Null, then Null is
        returned.
Only lowercase letters are converted to uppercase. All uppercase letters and non-letter characters remain unchanged.
Example
This example returns "NO LOWERCASE":
UCase("no lowercase")