USB Communication

Dear All,
Currently I am using samsung mobile with android 2.2, now i need two way communication from my PC to mobile through USB cable. The text which i type from my phone should simultaneously be visible in PC. Other way, text I typed in PC hyper terminal should display in mobile application How I can achieve this?

As for me I now use USB communication of my android phone with the PC to tramsfer files in both sides - it works great. Maybe It would be easier just to write in word or notepad the text and tehn copy your file?

Thanks Victoria for your reply.
But my intention is not only copy some chunk of data but I want to check whether we can use USB same as we use serial communication. If it is possible then I have other applications in my mind.
I want to send characters thorugh Hyperterminal of windows and those character should appear in android application after button click.

i think Victoria Sog may ok...

does it have to be using the cable? do you have a wifi connection ?
if yes you can try Airdroid from the play store

Yes. It should be through USB.
I am having a device which converts CAN messages to USB. I want to read those messages in Android Application.