The two ANSI macros, MB_LEN_MAX and MB_CUR_MAX, are useful when writing portable programs for international markets. The following list describes them and gives the include file where each is defined.
| Macro | Description |
| MB_CUR_MAX | The MB_CUR_MAX macro, defined in STDLIB.H, expands to the maximum number of bytes in a multibyte character of the current locale. |
| MB_LEN_MAX | The MB_LEN_MAX macro, defined in LIMITS.H, gives the maximum number of bytes in a multibyte character. |