You can try to use something like 'route print'. And get the result of the command. There is your IP Address there.

 C:\Documents and Settings\Administrator>route print
======================================================================
+=====
Interface List
0x1 ........................... MS TCP Loopback interface
0x10003 ...00 10 a4 11 4d 60 ...... Intel(R) PRO/100+ MiniPCI
======================================================================
+=====
======================================================================
+=====
Active Routes:
Network Destination        Netmask          Gateway       Interface  M
+etric
          0.0.0.0          0.0.0.0     192.168.55.1   192.168.55.13   
+    30
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1   
+    1
     192.168.55.0    255.255.255.0    192.168.55.13   192.168.55.13   
+    30
    192.168.55.13  255.255.255.255        127.0.0.1       127.0.0.1   
+    30
   192.168.55.255  255.255.255.255    192.168.55.13   192.168.55.13   
+    30
        224.0.0.0        240.0.0.0    192.168.55.13   192.168.55.13   
+    30
  255.255.255.255  255.255.255.255    192.168.55.13   192.168.55.13   
+    1
Default Gateway:      192.168.55.1
======================================================================
+=====
Persistent Routes:
  None

C:\Documents and Settings\Administrator>
[download]

192.168.55.13 is my IP Address where the netmask is 255.255.255.255 and the gateway is 127.0.0.1.... try to parse the output of this command