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IUnknown::Release

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  • Note   This topic describes IUnknown in the context of the AVIFile and AVIStream interfaces. For general information about IUnknown, see the Component Object Model (COM) documentation in the Windows SDK.

The Release method decrements the reference count of the appropriate handler: IAVIEditStream, IAVIFile, IAVIStream, IAVIStreaming, or IGetFrame. When the reference count reaches zero, the handler must free resources established for the file or stream.

ULONG Release(
  LPUNKNOWN ps  
);

Parameters

ps

Pointer to an IAVIEditStream, IAVIFile, IAVIStream, IAVIStreaming, or IGetFrame interface.

Return Values

Returns the resulting reference count.

Remarks

For handlers written in C++, Release has the following syntax:

HRESULT Release(VOID);

Requirements

**  Windows NT/2000/XP:** Requires Windows NT 3.1 or later.
**  Windows 95/98/Me:** Requires Windows 95 or later.
**  Header:** Declared in unknwn.h.

See Also

Custom File and Stream Handlers, Custom File and Stream Handler Interfaces, IAVIEditStream, IAVIFile, IAVIStream, IAVIStreaming, IGetFrame