wcstoul

   Converts the initial portion of the wide-character string pointed
   to by nptr to an unsigned long integer.

   Format

     #include  <wchar.h>

     unsigned long int wcstoul  (const wchar_t *nptr, wchar_t     
                                **endptr, int base);
 

Additional information available:

Function_Variants               Arguments       Description     Return_Values
Example