hab (HAB) - input
ulCodepage (ULONG) - input
If a non-existent code page is specified for ulCodepage, the code page specified by the queue associated with the calling thread is used.
ulCountry (ULONG) - input
pszCurrentChar (PSZ) - input
pszNextChar (PSZ) - returns
When the end of the string is reached, a pointer to the null-terminating character is returned.