How can I use the XBEE to replace RS232 Serial Communication

Here is the point,

I have got a microprocessor, (PIC16F877A) wich is sending the data of 8 sensors throught the RS232 serial cable through my PC, I can then monitor them with visual basic 2010 Express.

How can I use the xbee to replace this cable (and extend the range)?

Do I need to add some more libraries into VB Xpress?

If you use the RS232 versions of the XBee 802.15.4 product, all you need to do is to set the desired baud rate (9600 is default) and make the necessary RS232 connections. Not additional configuration or Lib needed.