WSAServiceClassInfo

typedef struct _WSAServiceClassInfoW {
    LPGUID              lpServiceClassId;
    LPWSTR              lpszServiceClassName;
    DWORD               dwCount;
    LPWSANSCLASSINFOW   lpClassInfos;
} WSASERVICECLASSINFOW, *PWSASERVICECLASSINFOW, *LPWSASERVICECLASSINFOW;