How to write the normal ABAP code in ABAP OO Style

Hi ,

          I am new in SAP ABAP . can  any one tell me how to write normal(Classical) reports in ABAP OO  style

ex: i have 3 table  like   MARA  MARD  MAKT

in MARA {    MATNR         ERSDA         MTART         MATKL         NTGEW         BRGEW    }

    MARD {   WERKS         LGORT  }

     MAKT  {  MAKTX }         

above are the fields in my structure .  based on  MATNR and  WERKS  i want to  display the result.

i know this how to write code in ABAP but  i am confuse in OO  ABAP

can any one tell me