hello,
I'm using bluetooth RS232 level interface to connect with PCs. Could you please tell me how to chat between PCs with bluetooth connection to each PC using hyperterminal. Thanks

 

You may try Comm Operator instead of hyperterminal.
Here is the link.
http://www.serialporttool.com/CommOpInfo.htm

To talk to other PC with bluetooth, run Comm Operator on both computer, and find the compute in bluetooth discover, add in/out com port on each computer, open those com port,then you can talk.