Hi Sorry for the late Post in this Thread, but i got the same problem. I'm using VS2005 Express and the latest PSDK. If is use the following code, the read-function doesnt succeed: if(CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INPROC_SERVER,IID_IFilterGraph,(void**)&myFilterGraph)!=S_OK) { M...