Is it field names or field values you're talking about? If it's field names, then Bastien's right, it can't be done.
Case-sensitive field values are another matter though.
If the field is not uniquely-indexed, then you can use ordinary CHAR fields but use case-sensitive comparisons:
[tt]
SELECT * FROM tbl WHERE fld = BINARY 'FldVal'
[/tt]
If the field is uniquely-indexed, or you want all comparisons of the field to be case-sensitive, you can simply use the BINARY attribute in the field declaration:
[tt]
fld CHAR(10) BINARY
[/tt]
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ALTER world DROP injustice, ADD peace;