DMOUnregister function (dmoreg.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The DMOUnregister function unregisters a DMO.
Syntax
HRESULT DMOUnregister(
REFCLSID clsidDMO,
REFGUID guidCategory
);
Parameters
clsidDMO
Class identifier (CLSID) of the DMO.
guidCategory
GUID that specifies the category from which to remove the DMO. Use GUID_NULL to unregister the DMO from every category. See DMO GUIDs for a list of category GUIDs.
Return value
Returns an HRESULT value. Possible values include the following.
| Result Code | Description |
|---|---|
| E_INVALIDARG | Invalid argument |
| S_FALSE | This CLSID was not registered in the specified category. |
| S_OK | Success |
Requirements
| Target Platform | Windows |
| Header | dmoreg.h (include Dmo.h) |
| Library | Msdmo.lib |
| DLL | Msdmo.dll |