hello everybody in this forum.

iam currently implementing chat server application that must connect to the outside world from windows xp sp1 or sp2.

i tried to add my application ports programmatically to the internet connection firewall in windows xp sp1 but i couldn't cause i see the com file "hnetcfg.dll" in my windows operating system doesn't have "INetFwMgr" class that i must interlop to add the ports to the current running service of my application in the firewall.
i asked some friends and they told me it is impossible to add these ports cause your windows xp is SP1 not SP2 but what i see strange ???

is that hotmail messenger currently do that in my windows xp Sp1 ? when i try to connect to the internet it adds two UDP ports to the current dial up connection used to connect to the internet.
my question is :

i want to know how to add these ports in the windows xp if it is sp1 or sp2 as hotmail messenger does ?

is there any com file i can take from hotmail messenger for doing that ???
and if there is a com file for doing that ? if i interlopped that .Dll com into my application and i registered that com in the target pc that will run my application it will work or it needs msn messenger to be installed first (this is in case i took dll from the com files of the msn msgr).

how can i add these ports ? Please help me.