Help Urget in Pro*c

Hi,
CREATE OR REPLACE PACKAGE SPK_GET_CONTR_TABLE AS
TYPE CONTR_TABLE IS TABLE OF VARCHAR2(50);
PROCEDURE PROC_GET_CONTR_TABLE (OUT_TABLE OUT CONTR_TABLE);
END;
/
show error;
/
CREATE OR REPLACE PACKAGE BODY SPK_GET_CONTR_TABLE AS
PROCEDURE PROC_GET_CONTR_TABLE (OUT_TABLE OUT CONTR_TABLE) IS
I NUMBER(10);
CURSOR GET_TPA
IS
  SELECT
        SERVICE_CONTRACT_NO||' ' ||
        S_C_LINE_ITEM_NO
  FROM SV.SVC_CONTR_CVRG_CA
  WHERE ROWNUM < 5;
BEGIN
  I := 1;
  OPEN GET_TPA;
  WHILE I < 4 LOOP
    FETCH GET_TPA
    INTO OUT_TABLE(I);
    I := I+1;
  END LOOP;
  CLOSE GET_TPA;
END;
END;
/
show error;
/

Above is the package procedure I had compiled. Now I want to call tha above procedure from a pro*c program.

I'm trying to call like this

#include <stdio.h>
#include <sqlca.h>

main()
{
 char SDATE[20];

EXEC SQL DECLARE tempBuffer TYPE AS OBJECT (bUFFER VARCHAR2(50));
EXEC SQL DECLARE tempBuffer1 TABLE OF tempBuffer;
ConnectToOracle();
EXEC SQL SELECT SYSDATE INTO SDATE FROM DUAL;
 printf("SYSDATE = %s" , SDATE);
 EXEC SQL  EXECUTE
 BEGIN
SV.SPK_GET_CONTR_TABLE.PROC_GET_CONTR_TABLE(tempBuffer1.bUFFER);
        END;
 END-EXEC;
 printf("SQLCODE = %d" , SQLCA.SQLCODE);
}

I'm not very sure how to pass the parameter to the procedure.  

Thanks,
Kotamraju