关于CoCreateInstance语句问题
IBaseFilter *pIBF;
CoCreateInstance(CLSID_FileSource,NULL,CLSCTX_INPROC_SERVER,IID_IBaseFilter,(void **)&pIBF)
执行CoCreateInstance语句创建一个filter时总返回-2147221164,说我没有注册,该怎么解决,可执行
CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INPROC_SERVER,IID_IGraphBuilder,(void**)&m_pGraph)这条语句正确
急!!!!!!!!