I need to know whether there is an api or code available to scan a QR code in blackberry having OS6.0 and above . i am new to QR coding section so please guide me .
Starting with BlackBerry OS 6 the xzing bar code scanning library is included in the API. RIM has provided a Developers' guide available here. I suggest you start there, and follow up with other reading. Zxing is a Google library with lots of on-line documentation available.