IResourceManager::CancelRequest method (strmif.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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 CancelRequest method cancels the request for a resource.
Syntax
HRESULT CancelRequest(
[in] LONG idResource,
[in] IResourceConsumer *pConsumer
);
Parameters
[in] idResource
Resource identifier of a pending request.
[in] pConsumer
Pointer to the IResourceConsumer interface that made the request.
Return value
Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants, or other values not listed.
| Return code | Description |
|---|---|
|
Failure. |
|
NULL pointer argument. |
|
Invalid argument. |
|
Method isn't supported. |
|
Success. |
Remarks
This method should be called when the IResourceConsumer object that requested the resource has not received it and no longer requires it. If it has already received the resource, it should use the IResourceManager::NotifyRelease method.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |