char = ToLower(char);
D0 D0
UBYTE ToLower(UBYTE);
Converts a character to lower case, handling international character sets.
Whenever locale.library is installed in a system, this function is replaced by language-specific code. This means that depending on which language the user has currently selected, a given character may return different results when passed to this function. This fact must be taken into consideration when using this function.