@msdn=http://search.msdn.microsoft.com/Default.aspx?query=$$$ @pinvoke=http://pinvoke.net/$$$.htm Summary: The MIB_IPNETROW structure contains information for an Address Resolution Protocol (ARP) table entry for an IPv4 address. !!!!C# Signature: [StructLayout(LayoutKind.Sequential)] struct MIB_IPNETROW { /// <summary> /// The index of the adapter. /// </summary> public int dwIndex; /// <summary> /// The length, in bytes, of the physical address. /// </summary> public int dwPhysAddrLen; /// <summary> /// The physical address. /// </summary> [MarshalAs(UnmanagedType.ByValArray, SizeConst=IPHelper.MAXLEN_PHYSADDR)] public byte[] bPhysAddr; /// <summary> /// The IPv4 address. /// </summary> public int dwAddr; /// <summary> /// The type of ARP entry. This type can be one of the following values. /// </summary> public IPNetRowType dwType; } !!!!User-Defined Types: public class IPHelper { public const int NO_ERROR = 0; /// <summary> /// The buffer pointed to by the pIpNetTable parameter is not large enough. /// The required size is returned in the DWORD variable pointed to /// by the pdwSize parameter. /// </summary> public const int ERROR_INSUFFICIENT_BUFFER = 122; /// <summary> /// An invalid parameter was passed to the function. This error is returned /// if the pdwSize parameter is NULL, or GetIpNetTable is unable to write /// to the memory pointed to by the pdwSize parameter. /// </summary> public const int ERROR_INVALID_PARAMETER = 87; /// <summary> /// The IPv4 transport is not configured on the local computer. /// </summary> public const int ERROR_NOT_SUPPORTED = 50; public const int MAXLEN_PHYSADDR = 8; /// <summary> /// The GetIpNetTable function retrieves the IP-to-physical address mapping table. /// </summary> /// <param name="pIpNetTable">A pointer to a buffer that receives the /// IP-to-physical address mapping table as a MIB_IPNETTABLE structure.</param> /// <param name="pdwSize">On input, specifies the size of the buffer pointed to /// by the pIpNetTable parameter. /// <para>On output, if the buffer is not large enough to hold the returned mapping table, /// the function sets this parameter equal to the required buffer size</para></param> /// <param name="bOrder">A Boolean value that specifies whether the returned mapping /// table should be sorted in ascending order by IP address. If this parameter is TRUE, /// the table is sorted.</param> /// <returns>If the function succeeds, the return value is NO_ERROR. /// <para>If the function fails, the return value is one of the following error codes: /// ERROR_INSUFFICIENT_BUFFER, ERROR_INVALID_PARAMETER, ERROR_NOT_SUPPORTED or other code. /// </para> /// </returns> [DllImport("Iphlpapi.dll", EntryPoint="GetIpNetTable")] private static extern int GetIpNetTable(IntPtr pIpNetTable, ref int pdwSize, bool bOrder); } !!!!Alternative Managed API: Do you know one? Please contribute it! !!!!Notes: None. !!!!Tips & Tricks: Please add some! !!!!Sample Code: Please add some! Documentation: MIB_IPNETROW@msdn on MSDN
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