LNK2019 for OCIDescAlloc

Hi dear all,

I'm linking an OCI program which use the OCIDescAlloc, firstly the compiler complain

error C4013: 'OCIDescAlloc' undefined; assuming extern returning int

then I add a prototype manually as follow

sword OCIDescAlloc ( const void   *parenth,
                   void         **descpp,
                   ub4           type,
                   size_t        xtramem_sz,
                   void         **usrmempp);

this time I got LNK2019 error

error LNK2019: unresolved external symbol _OCIDescAlloc referenced in function _insert_blob

I do add the oci.lib in the lib path . so what's wrong with this ? many thanks !!!