Help With Parameter Values In Stored Procedure

Hi,
I am using a stored Procedure where I am passing some parameter values.Following is my Code.

CREATE proc Usp_Rpt_GetDetails
@Fromdt varchar(12),
@ToDt varchar(12),
@ApscId numeric,
@StatusCode varchar(1),
@val numeric
as

Begin

if @StatusCode = "C" then @ vall(1,2)

End
select
'' as unuseid,
substring(ltrim(rtrim(s.Spares_Code)),1,12) as Code,
oh.WO_Number AS Claim_Id,
ltrim(rtrim(sc.section_code)) AS section_code,
ltrim(rtrim(dc.defect_code)) AS defect_code,
ltrim(rtrim(at.Action_Taken_Code)) AS Repair_Code,
cs.Call_status_code
from [32_Trans_Work_Order_Spares_Detail] ws
inner join [32_Trans_Work_Order_Header] oh on oh.WO_Number = ws.WO_Number
inner join [11_Master_Spares]s on s.Spares_ID = ws.Spares_ID
inner join [31_Master_Section_Code] sc on sc.Section_ID = ws.Section_Code_ID
inner join [31_Master_Defect_Code] dc on dc.Defect_ID = ws.Defect_Code_ID
inner join [10_Master_Equipment_Status] e on e.Equipment_Status_ID = oh.Equipment_Status_ID
inner join [00_Master_Country] c on c.Country_ID = mp.Country_ID
where e.Equipment_Status_ID in (1,2) and cs.Call_Status_ID in (1,2) and oh.WO_Record_Date between @Fromdt and @ToDt
and oh.WO_Status='C'


My Problem is How to pass values to parameters
Status Code Consists of values C, V, R which i am passing from the Front End
along with Call_Status_ID which can be 1,2.

Thanks ...