在iphlpapi.dll里面有一个函数：GetAdaptersInfo()

好像是干这个用的。说明如下：

GetAdaptersInfo

The GetAdaptersInfo function retrieves adapter information for the local computer.

DWORD GetAdaptersInfo(

 PIP_ADAPTER_INFO pAdapterInfo,    // buffer to receive data

 PULONG pOutBufLen                 // size of data returned

);

Parameters

pAdapterInfo  

[out] Pointer to a buffer that, , receives a linked list of IP_ADAPTER_INFO structures.  

pOutBufLen  

[in] Pointer to a ULONG variable that specifies the size of the buffer pointed to by the pAdapterInfo parameter. If this size is insufficient to hold the adapter information, GetAdaptersInfo fills in this variable with the required size, and returns an error code of ERROR_BUFFER_OVERFLOW.  

Return Values

If the function succeeds, the return value is ERROR_SUCCESS.

If the function fails, the return value is one of the following error codes.

Value Meaning  

ERROR_BUFFER_OVERFLOW The buffer size indicated by the pOutBufLen parameter is too small to hold the adapter information. The pOutBufLen parameter points to the required size.  

ERROR_INVALID_PARAMETER The pOutBufLen parameter is NULL, or the calling process does not have read/write access to the memory pointed to by pOutBufLen, or the calling process does not have write access to the memory pointed to by the pAdapterInfo parameter.  

ERROR_NO_DATA No adapter information exists for the local computer.  

ERROR_NOT_SUPPORTED GetAdaptersInfo is not supported by the operating system running on the local computer.  

Other If the function fails, use FormatMessage to obtain the message string for the returned error.  

Requirements  

 Windows NT/2000: Requires Windows 2000.

 Windows 95/98: Requires Windows 98.

 Header: Declared in Iphlpapi.h.//没有

 Library: Use Iphlpapi.lib.//没有

IP_ADAPTER_INFO

The IP_ADAPTER_INFO structure contains information about a particular network adapter on the local computer.

typedef struct _IP_ADAPTER_INFO {

 struct _IP_ADAPTER_INFO* Next;

 DWORD ComboIndex;

 char AdapterName[MAX_ADAPTER_NAME_LENGTH + 4];

 char Description[MAX_ADAPTER_DESCRIPTION_LENGTH + 4];

 UINT AddressLength;

 BYTE Address[MAX_ADAPTER_ADDRESS_LENGTH];

 DWORD Index;

 UINT Type;

 UINT DhcpEnabled;

 PIP_ADDR_STRING CurrentIpAddress;

 IP_ADDR_STRING IpAddressList;

 IP_ADDR_STRING GatewayList;

 IP_ADDR_STRING DhcpServer;

 BOOL HaveWins;

 IP_ADDR_STRING PrimaryWinsServer;

 IP_ADDR_STRING SecondaryWinsServer;

 time_t LeaseObtained;

 time_t LeaseExpires;  

} IP_ADAPTER_INFO, *PIP_ADAPTER_INFO;

Members

Next  

Pointer to the next adapter in the linked list of adapters.  

ComboIndex  

This member is unused.  

AdapterName[MAX_ADAPTER_NAME_LENGTH + 4]  

Specifies the name of the adapter.  

Description[MAX_ADAPTER_DESCRIPTION_LENGTH + 4]  

Specifies a description for the adapter.  

AddressLength  

Specifies the length of the hardware address for the adapter.  

Address[MAX_ADAPTER_ADDRESS_LENGTH]  

Specifies the hardware address for the adapter. //这个是不是你想要的？

Index  

Specifies the adapter index.  

Type  

Specifies the adapter type.  

DhcpEnabled  

Specifies whether dynamic host configuration protocol (DHCP) is enabled for this adapter.  

CurrentIpAddress  

Specifies the current IP address for this adapter.  

IpAddressList  

Specifies the list of IP addresses associated with this adapter.  

GatewayList  

Specifies the IP address of the default gateway for this adapter.  

DhcpServer  

Specifies the IP address of the DHCP server for this adapter.  

HaveWins  

Specifies whether this adapter uses Windows Internet Name Service (WINS).  

PrimaryWinsServer  

Specifies the IP address of the primary WINS server.  

SecondaryWinsServer  

Specifies the IP address of the secondary WINS server.  

LeaseObtained  

Specifies the time when the current DHCP lease was obtained.  

LeaseExpires  

Specifies the time when the current DHCP lease will expire.  

Requirements  

 Windows NT/2000: Requires Windows 2000.

 Windows 95/98: Requires Windows 98.

 Header: Declared in Iptypes.h.