#define _WIN32_WINNT 0x0600
#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <winsock2.h>
#include <ws2ipdef.h>
#include <iphlpapi.h>

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char** argv)
{
       DWORD                      dwStatus;
       MIB_IPFORWARD_ROW2 route;
       
       if (argc != 3)
       {
               printf("Usage: %s <ifNum> <numOfBits>\n\n", argv[0]);
               return -1;
       }

       InitializeIpForwardEntry(&route);       

       route.InterfaceIndex = atoi(argv[1]);
       route.DestinationPrefix.Prefix.si_family = AF_INET;

       route.DestinationPrefix.Prefix.Ipv4.sin_addr.s_addr = inet_addr("1.2.3.0");     
       route.DestinationPrefix.Prefix.Ipv4.sin_family = AF_INET;

       route.DestinationPrefix.PrefixLength = atoi(argv[2]);
       
       route.NextHop.Ipv4.sin_addr.s_addr = inet_addr("11.22.33.44");  
       route.NextHop.Ipv4.sin_family       = AF_INET;

       route.SitePrefixLength          = 0;

       route.Protocol                  = MIB_IPPROTO_NETMGMT;          
       route.Origin                            = NlroManual;
       route.ValidLifetime             = 0xffffffff;
       route.PreferredLifetime         = 0xffffffff;
       route.Metric                            = 1;
       
       dwStatus = CreateIpForwardEntry2(&route);
       return dwStatus;
}