How to get the PDEContainer using PDSMCGetPDEContainer

Hi Team

I want to get the exact location of the figure and formula from the tagged PDF. i am able to read the tagged structure from the PDF using below code, but i got struck ed to get the PDEcontainer by using PDSMCGetPDEContainer. how to obtain the pdecontainer i am i missing anything here?

ASAtom kidType = PDSElementGetKidWithMCInfo(element,  //The PDSElement containing the kid that is retrieved

                                                    kidIndex, //The index of the kid.

                                                    &kid,     //The kid being accessed (depending on the kid's type) or NULL.

                                                    &mcidInfo,//The kid's information object or NULL.

                                                    NULL,     //Pointer to the kid or NULL.

                                                    &CosPage);    //The CosObj of the page containing the kid or NULL

        char buf[256], title[128];

        buf[0] = title[0] = '\0';

        if (kidType == StructElem_K){

            ASInt32 title_size = PDSElementGetTitle (kid, reinterpret_cast<ASUns8*> (title));

            char IDS[128];

            IDS[0]  = '\0';

            ASInt32 ID_size = PDSElementGetID (kid, reinterpret_cast<ASUns8*>(IDS));

            strcat (buf, reinterpret_cast<char *>(IDS));

            string CurentName(buf);

            if (CurentName.find("Figure") != string::npos)

            {

                string test(buf);

                PDSMC Obj = (PDSMC) mcidInfo.mcid;

                PDEContainer pdeContainer = PDSMCGetPDEContainer((PDSMC)Obj);// iam getting error

                PDEContent  content = PDEContainerGetContent (pdeContainer);

            }

            GetElemInfo(kid);

        }

Thanks,

Balamurugan V