Hi,
         I try to use multi index container.I have one problem.Please help me.Thanks

         struct TOrder
         {
                   char szDate[9]; //date type
                   int nID; // order id
                   int nProductID; //product id
                   double fPrice;//
                   int nVol;//

                   //other member
                   бн
         }

         //

         The unique key of TOrder struct is szDdate and nID.

         How I can typedef the composite_key and the multi_index_container?

         Thank you for your help.

Best regards.

Yuan