If a report attached to a form ,how can the report display the values of the selected one in form?

suppose i put my report on the  CustPackingSlipJour  form then i selected on e record,i want to display the information of that particular record only in my report then the following code helps    

public class ReportRun extends ObjectRun

{

    CustPackingSlipJour     externalCustPackingSlipJour;

}

public void init()

{

    element.initFromArgs(element.args());

    super();

}

void initFromArgs(Args args)

{

    if (args && args.dataset())

    {

        switch(args.dataset())

        {

               case tablenum(CustPackingSlipJour) :

                                        externalCustPackingSlipJour  =   args.record();        

        }

     } 

}