How to scan blackberry bar code to download application on internet or any where

This is how you are going to do it

1) You have the barcode image on you PC screen and
2) Open blackberry app world on you handset
3) Select options -> Scan a barcode.
4) Camera starts and you point your handset screen towards the barcode image on the PC monitor to capture the bar code.
5) That's all, the application download automatic
Remember the barcode image should be aligned properly for the camera to decode the barcode.