stored procedures + vb net = HELP

I have made a procedure using FENISql and it looks like this:

set term !!;
/*QC - QUEUE_CONTROL - keepeing the sequence of FIFO*/
create procedure foo (Buf_Num int)
Returns (Next_QC bigint)
As
/*for keeping current value of QC in asking BUFFER from tbl buffers*/
Declare Variable Temp_Result bigint;
Begin
Temp_Result = Null;
SELECT first 1 QUEUE_CONTROL
FROM Buffers
WHERE BUFFER_NUMBER = :Buf_Num
ORDER BY QUEUE_CONTROL DESC
INTO :Temp_Result;
If (Temp_Result is Null) Then
Begin
SELECT first 1 QUEUE_CONTROL
FROM Main
ORDER BY QUEUE_CONTROL ASC
INTO :Next_QC;
End Else
Begin
SELECT first 1 QUEUE_CONTROL
FROM Main
WHERE QUEUE_CONTROL > :Temp_Result
ORDER BY QUEUE_CONTROL ASC
INTO :Next_QC;
End
End!!
set term ;!!
/*---------------------------------------------------------*/
and I would like to lunch it from vb.net, I have got a componets ... but I can not put a parameters Can somebody can Help me ??
Best Regrads