Header File 

mbstring.h 

Category 

Memory and String Manipulation Routines 

Prototype 

unsigned char *_mbsspnp(const unsigned char *s1, const unsigned char *s2); 

Description 

Each of these functions search for the first character in s1 that is not contained in s2. 

Use the portable macro, _tcsspnp, defined in tchar.h, to access these functions. 

Return Value 

The functions return a pointer to the first character in s1 that is not found in the character set for s2. 

If every character from s1 is found in s2, each of the functions return NULL.