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CEnumPins::Next

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Microsoft DirectShow 9.0

CEnumPins::Next

The Next method retrieves a specified number of pins in the enumeration sequence. This method implements the IEnumPins::Next method.

Syntax

  HRESULT Next(
    ULONG cPins,
    IPin **ppPins,
    ULONG *pcFetched
);

Parameters

cPins

Number of pins to retrieve.

ppPins

Array of size cPins that is filled with IPin pointers.

pcFetched

Pointer to a variable that receives the number of pins retrieved. Can be NULL if cPins is 1.

Return Value

Returns one of the HRESULT values shown in the following table.

Value Description
S_FALSE Did not retrieve as many pins as requested.
S_OK Success.
E_INVALIDARG Invalid argument.
E_POINTER NULL pointer argument.
VFW_E_ENUM_OUT_OF_SYNC The filter's state has changed and is now inconsistent with the enumerator.

Remarks

This method retrieves pointers to the specified number of pins, starting at the current position in the enumeration, and places them in the specified array.

This method calls the filter's CBaseFilter::GetPin method to retrieve the pins.

If the method succeeds, the IPin pointers all have outstanding reference counts. Be sure to release them when you are done.

Requirements

**  Header:** Declared in Amfilter.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also