请问高人WSAPROTOCOL_INFOW 的结构定义

我在msdn上搜索到了WSAPROTOCOL_INFOW 的结构定义，但全是英文的，请问
WSAPROTOCOL_INFOW 的结构每一个意思是什么啊
typedef struct _WSAPROTOCOL_INFO
{  
DWORD dwServiceFlags1;  
DWORD dwServiceFlags2;  
DWORD dwServiceFlags3;
 DWORD dwServiceFlags4;  
DWORD dwProviderFlags;  
GUID ProviderId;  
DWORD dwCatalogEntryId;
 WSAPROTOCOLCHAIN ProtocolChain;  
int iVersion;
 int iAddressFamily;  
int iMaxSockAddr;
 int iMinSockAddr;
 int iSocketType;
 int iProtocol;  
int iProtocolMaxOffset;
 int iNetworkByteOrder;  
int iSecurityScheme;
 DWORD dwMessageSize;
 DWORD dwProviderReserved;
 WCHAR szProtocol[WSAPROTOCOL_LEN+1];
} WSAPROTOCOL_INFO,  *LPWSAPROTOCOL_INFO;