Like this...first, all quotes are for reference, not for use in the actual execution.
take the program c:\winnt\system32\telnet.exe
from the command line, which you get to by going to start, then clicking on run, and typing the following(for win2k and XP): "cmd.exe" no quotes.
from here, you will type, "cd\" no quotes. This will get you to the base directory. then you type: "cd winnt\system32"
Then type "telnet.exe /?" This will show you the command line options available to you.
something like this:
telnet [-a][-e escape char][-f log file][-l user][-t term][host [port]]
-a Attempt automatic logon. Same as -l option except uses
the currently logged on user's name.
-e Escape character to enter telnet client prompt.
-f File name for client side logging
-l Specifies the user name to log in with on the remote system.
Requires that the remote system support the TELNET ENVIRON option.
-t Specifies terminal type.
Supported term types are vt100, vt52, ansi and vtnt only.
host Specifies the hostname or IP address of the remote computer
to connect to.
port Specifies a port number or service name.
Hope that helps you understand it a little better.