As in SBCS PM, the MLSS_CASESENSITIVE style flag specifies whether the case of alphabets should be ignored or respected. Although each Double-Byte Character Set has DBCS alphabets in it, the case-insensitivity is not applied to DBCS alphabets. If an application needs to provide this capability, it has to do case translation by itself since WinUpperChar does not translate DBCS alphabets either.