DynamicID

[novelty]

Hi
I am a .NET Programmer I want to know
How to find DynamicID
Scenario :

Server Side:

Wants to find client’s
Dynamic ID
For Transfer Files
Before that want to
Send Message to Client

Client side:
Wants to show server’s
message in Messenger
and wants to down
load the files send by server
And wants to reply through messenger

Constrains:
both side using
Desk Top Application

Friends do you have any idea about the
Concepts need to apply

[sicarie]

What do you mean by dynamic id? Will the IP address not work? If not, why not create a unique id that the server will assign the client?