Using TCpClient/Sockets with Modem

[den 2005]

Hi everybody,

I am still learning how sockets, TcpClient and TcpListener work, in order
that both sides to send and receive data, both sides must have a socket or
TcpListener and a TcpListener right?
Is there a possible way to say just have a client side TcpClient
application to send a message to remote server like sending a text file?
Do TcpClient requires a Internet connection to connect say to remote
server? So, to connect to a VPN network(remote server), I need to establish
internet connection like using RAS. Right?
How do you programatically create connection using a local USB port with a
GPRS modem? Using Sockets or TCPClient will be enough to do that?
Please provide me with info on these questions.

Is there anybody knows how to do this? Thanks.

den2005
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MCP Year 2005, Philippines