Record Selection in SSRS 2008

Hi Friends,

I came across one scenario while converting Record Selection in Crystal to SSRS..Please guide me how  to use the below code in SSRS filter condition.

If {?StatusFlag} ="A" then
   {DebtorFees.ActiveFlag}=true
else if {?StatusFlag} ="I" then
   {DebtorFees.ActiveFlag}=false
else
    {DebtorFees.ActiveFlag}

Thanks,

Sam.