关于用C#进行P/Invoke调用的问题，求高人帮助~

各位专家，最近我尝试通过调用API函数CreateIpForwardEntry2来修改VISTA下的路由表，GetLastWin32Error返回的结果表明调用成功，但是API函数的返回值是87（参数传递错误），这几天一直在折腾这个问题，自己实在是难以解决了，只好到这里寻求专家的帮助了。哪位高人能够帮助小弟用C#实现这个调用？不胜感激！

下面是SDK里函数和参数的部分描述，我给摘到这里来了。

CreateIpForwardEntry2
The CreateIpForwardEntry2 function creates a new IP route entry on the local computer.
NETIOAPI_API CreateIpForwardEntry2(
  const MIB_IPFORWARD_ROW2* Row
);

MIB_IPFORWARD_ROW2
The MIB_IPFORWARD_ROW2 structure stores information about an IP route entry.
typedef struct _MIB_IPFORWARD_ROW2 {
  NET_LUID Inte易做图ceLuid;
  NET_IFINDEX Inte易做图ceIndex;
  IP_ADDRESS_PREFIX DestinationPrefix;
  SOCKADDR_INET  NextHop;
  UCHAR SitePrefixLength;
  ULONG ValidLifetime;
  ULONG PreferredLifetime;
  ULONG Metric;
  NL_ROUTE_PROTOCOL Protocol;
  BOOLEAN Loopback;
  BOOLEAN AutoconfigureAddress;
  BOOLEAN Publish;
  BOOLEAN Immortal;
  ULONG Age;
  NL_ROUTE_ORIGIN Origin;
} MIB_IPFORWARD_ROW2,
  *PMIB_IPFORWARD_ROW2;

NET_LUID
The NET_LUID structure is the locally unique identfier (LUID) for a network inte易做图ce.
typedef union _NET_LUID {
  ULONG64 Value;
  struct {
    ULONG64 Reserved  :24;
    ULONG64 NetLuidIndex  :24;
    ULONG64 IfType  :16;
  } Info;
} NET_LUID,
  *PNET_LUID;

IP_ADDRESS_PREFIX
The IP_ADDRESS_PREFIX structure stores an IP address prefix.
typedef struct _IP_ADDRESS_PREFIX {
  SOCKADDR_INET Prefix;
  UINT8 PrefixLength;
} IP_ADDRESS_PREFIX,
  *PIP_ADDRESS_PREFIX;

SOCKADDR_INET
The SOCKADDR_INET union contains an IPv4 or IPv6 address and address family.
typedef union _SOCKADDR_INET {
  SOCKADDR_IN Ipv4;
  SOCKADDR_IN6 Ipv6;
  ADDRESS_FAMILY si_family;
} SOCKADDR_INET,
  *PSOCKADDR_INET;

struct sockaddr_in {
        short   sin_family;
        u_short sin_port;
        struct  in_addr sin_addr;
        char    sin_zero[8];
};

struct sockaddr_in6 {
        short   sin6_family;
        u_short sin6_port;
        u_long  sin6_flowinfo;
        struct  in6_addr sin6_addr;
        u_long  sin6_scope_id;
}; --------------------编程问答-------------------- 使用C++写好一个DLL然后调用下，
可能要比直接平台调用方便点吧

补充：.NET技术 ,  C#