This method registers an identifiable instance of a filter.

HRESULT RegisterFilterInstance(
  CLSID clsid,


  • clsid
    [in] Globally unique identifier (GUID) of the filter.
  • Name
    [in] Descriptive name of the instance.
  • MRId
    [out] Returned media resource ID. This parameter is a locally unique identifier for this instance of this filter.

Return Values

Returns an HRESULT value.


This method handles cases such as when two similar sound cards that are driven by the same driver are available, and it is necessary to choose which card will emit the sound. This is not needed if there is only one instance of the filter (such as when there is only one sound card in the computer), or if all instances of the filter are equivalent.

The filter itself must have already been registered.


DirectShow applications and DirectShow filters have different include file and link library requirements. See Setting Up the Build Environment for more information.

OS Versions: Windows CE 2.12 and later. Version 2.12 requires DXPAK 1.0 or later.

See Also

IFilterMapper Interface

Last updated on Wednesday, April 13, 2005

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