Problem with CoCreateInstance

I have a Problem with CoCreateInstance -> the following code is out of the msdn-example.


IAMMultiMediaStream *pAMStream;
result = CoCreateInstance(CLSID_AMMultiMediaStream, NULL, CLSCTX_INPROC_SERVER,IID_IAMMultiMediaStream, (void **)&pAMStream);

my "result"-value is REGDB_E_CLASSNOTREG

I don't know whats wrong, because i think all dll's are registered
Maybe I forgot somelthing to register ore something else...)

Can somebody help?

thx
Daniel

You can try to use regsvr32.exe to register the dll again.

all directX-dlls or only the one for directShow??

It should be the dll that contains IAMMultiMediaStream. Only in worst case, you may want to re-install DirectX.