IGraphBuilder::Connect method (strmif.h)

The Connect method connects the two pins, using intermediates if necessary.


HRESULT Connect(
  [in] IPin *ppinOut,
  [in] IPin *ppinIn


[in] ppinOut

Pointer to the IPin interface on the output pin.

[in] ppinIn

Pointer to the IPin interface on the input pin.

Return value

Returns an HRESULT. Possible values include the following.

Return code Description
Partial success; some of the streams from this pin use an unsupported format.
Operation aborted.
NULL pointer argument.
No combination of intermediate filters could be found to make the connection.
At least one of the filters is not in the filter graph.


This method connects two pins directly or indirectly, adding intermediate filters if necessary. The method starts by attempting a direct connection. If that fails, it tries to use any filters that are already in the filter graph and have unconnected input pins. (It enumerates these in an arbitrary order.) If that fails, it searches for filters in the registry, and tries them in order of merit. For more information, see Intelligent Connect.

During the connection process, the Filter Graph Manager ignores pins on intermediate filters if the pin name begins with a tilde (~). For more information, see PIN_INFO.


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

See also

Error and Success Codes

IGraphBuilder Interface