The MFindSubstr method

This method searches for the first occurrence of the multibyte string s2 in the multibyte string s1.

char *MFindSubstr(const char *s1, const char *s2,
              int nbytes1 = ITLocale::ScanToNul, 
              int nbytes2  = ITLocale::ScanToNul) const

The nbytes1 and nbytes2 parameters specify the length in bytes of the s1 and s2 strings. You can provide an integer to specify the number of bytes in the corresponding string. Or you can use the constant ITLocale::ScanToNul (the default) to specify that the corresponding string is null-terminated.

This method returns a pointer to the first occurrence of the multibyte string s2 in s1.

If there is an error, this method returns -1. Call ITLocale::GetError() to retrieve a specific error message.