I want to regexp a UTF character using the code.
When doing something similar with unicode characters this works fine:

s/\x{00C0}//g;  # delete the upside-down, sentence 
                #  initial question mark used in Spanish
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However, if I do something similar with a corresponding UTF-8 code i.e.,

s/\x{C0BF}//g; # also tried \x{C0 BF} which resulted, as expected, 
               #  in an 'illegal hexidecimal digit...' error message
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nothing happens. How can I regexp these codes? Thanks! **that UTF8 code should be C2 BF...