Can anybody help finding me the way how to refund amount from paypal and get balance enqiry using salesforce.

I already done successful integration with salesforce and paypal and my class is working for making payements to sandbox account of paypal using my VF page through the s=following controller and vf page.

Can anybody help finding me the way how to refund amount from paypal and get balance enqiry using salesforce.

I already done successful integration with salesforce and paypal and my class is working for making payements to sandbox account of paypal using my VF page through the s=following controller and vf page.