If this pin is connected to another pin, this method returns a pointer to that pin.

HRESULT ConnectedTo(
  IPin** ppPin


  • ppPin
    [out] Pointer to an IPin pointer to the IPin interface of the other pin (if any) to which this pin is connected. If there is no connection, the other pin interface pointer will be NULL.

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.


This method is implemented in the base classes by CBasePin::ConnectedTo. The interface returned by this method has had its reference count incremented. Be sure to use IUnknown::Release on the interface to decrement the reference count when you have finished using the interface.


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.

See Also

IPin Interface

Last updated on Wednesday, April 13, 2005

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