Header File 

mbstring.h 

Category 

Classification Routines 

Prototype 

int _mbbtype(unsigned char ch, int mode); 

Description 

The _mbbtype function inspects the multibyte argument, character ch, to determine whether it is a single-byte character, or whether ch is the leadbyte or trailing byte in a multibyte character. The _mbbtype function can determine whether ch is an invalid character. 

Return Value 

The value that _mbbtype returns is one of the following manifest constants, defined in mbctype.h. The return value depends on the value of ch and the test which you want performed on ch.