Oracle Forms 4.5.7 ROWTYPE

I have created a function that return a ROWTYPE in the Oracle Database.
However, my Oracle Forms version 4.5.7 seems does not support that, or I should not implement like this? are there any other solutions?

The code below is the function I have created in the database.
 

CREATE OR REPLACE
FUNCTION SP_PRODUCT_fn_GET_REC (
        pt_prod_code IN      PRODUCTS.PROD_CODE%TYPE
	) 
RETURN PRODUCTS%ROWTYPE
IS
   r_ProdRec   PRODUCTS%ROWTYPE;
   
    CURSOR c_Prod IS 
	SELECT  *
	FROM	PRODUCTS
	WHERE 	PROD_CODE = pt_prod_code;
BEGIN
    OPEN c_Prod;
    FETCH c_Prod INTO r_ProdRec;
    CLOSE c_Prod;
    RETURN r_ProdRec;

END SP_PRODUCT_fn_GET_REC;
/

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The code below is the partial code in the Oracle Forms.
 

DECLARE
pt_prod_rec   PRODUCTS%ROWTYPE;

BEGIN
    pt_prod_rec := SP_PRODUCT_fn_GET_REC('12345678');

END;

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