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   NAME
        ToLower -- convert a character to lower case. (V37)

   SYNOPSIS
        char = ToLower(char);
        D0             D0

        ubyte tolower(ubyte);

   FUNCTION
        Converts a character to lower case, handling international character
        sets.

   INPUTS
        char - character to be converted.

   RESULTS
        char - lower case version of the input character.

   NOTES
        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.

   SEE ALSO
        toupper(), locale.library/convtolower()