IEnumRegFilters::Next

  • 项目

This method fills the array with descriptions of the next set of filters (specified by the cFilters parameter) that meet the requirements specified upon creation of the enumerator.

HRESULT Next(
  ULONG cFilters,
  REGFILTER** apRegFilter,
  ULONG* pcFetched
);

Parameters

  • cFilters
    [in] Number of filters.
  • apRegFilter
    [out] Pointer to an array of REGFILTER pointers.
  • pcFetched
    [out] Actual number of filters passed.

Return Values

Returns an HRESULT value that depends on the implementation. HRESULT can be one of the following standard constants or other values not listed.

Value Description
E_FAIL Failure.
E_POINTER Null pointer argument.
E_INVALIDARG Invalid argument.
E_NOTIMPL Method is not supported.
S_OK or NOERROR Success.

Remarks

The calling application must use the Win32 CoTaskMemFree function to free each REGFILTER pointer returned in the array. Do not free the Name member of the REGFILTER structure separately, because IEnumRegFilters::Next allocates memory for this string as part of the REGFILTER structure.

Requirements

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.
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Last updated on Wednesday, April 13, 2005

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