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Naidu SagviNaidu Sagvi 

what is the need of visual force page if evertying availabe in standard controller

bob_buzzardbob_buzzard
A standard controller can't be used without a Visualforce page.  The purpose of a VF page that only uses the standard controller is really around displaying/editing data in a different format to the standard pages or displaying a main record and a bunch of related information on a single page.